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Forcing a tool call on every request can cause unnecessary lookups, latency and data exposure when a direct response would suffice. The normal helpdesk case should use automatic selection between scoped search and create capabilities, with any state-changing ticket creation authorized separately at the execution boundary.

Specialists can propose actions but should not automatically hold every business privilege. The proposed option cannot provide the specific “Allow automatic tool selection with clear descriptions and separate write authorization” behavior that the case requires. Automatic selection can choose read or create based on the user's actual intent, while write access remains separately authorized at execution.

Production restart isolation protects high-impact operations, but the helpdesk question concerns ordinary selection between search_ticket and create_ticket. Provide accurate tool descriptions and allow appropriate selection, while separately checking authorization for any ticket creation; an unrelated restart workflow does not determine which ticket tool is needed.

The coordinator's ability to apologize afterward cannot undo deleted tickets. A review-only specialist must have only read and search capabilities, with ticket deletion omitted from its tool allowlist and denied at the execution layer. A human-readable apology is not a safety control.

A prompt-only warning is weaker than capability restriction. A natural-language request to be cautious is not a permission boundary. If the agent can invoke delete_ticket, a mistaken tool selection or injected instruction can still reach that destructive capability.

Automatic tool choice helps when a small set of clearly described capabilities fits the request. With fifty similar issue trackers visible, the model still has excessive ambiguity and opportunity for wrong-repository writes. Filter the catalog to the actual task's repository before selection.

Discovery metadata determines whether a model can select the appropriate capability. This alternative does not establish how to reduce model routing errors through contextual tool catalogs in the stated workflow.

Specialists can propose actions but should not automatically hold every business privilege. Although useful elsewhere, it is not the direct mechanism to reduce model routing errors through contextual tool catalogs.

The alternative, “Allow automatic tool selection with clear descriptions and separate write authorization”, can matter in another part of the workflow. The proposed option cannot provide the specific “Reserve final customer side effects for an authorized coordinator or dedicated execution gate” behavior that the case requires. Keep the diagnostic specialist read-only and route any refund request through a separately authorized, logged transaction service.

Occasional need does not justify permanent broad privilege. That addresses a different part of the system, not the requirement to separate specialist recommendations from final execution rights.

A fact-checker's restricted tool list is a useful example of least privilege, but this diagnostic subagent can currently send refunds. The appropriate architecture places refund side effects behind an authorized coordinator or execution gate, independent of diagnostic agents, rather than merely documenting another specialist's limits.

Automatic selection with clear descriptions helps ordinary helpdesk routing, but it does not necessarily prevent forcing web search for confidential arithmetic. Change the tool_choice policy itself to permit a direct local answer, and keep web access unavailable when task requirements and data sensitivity do not justify it.

A separately approved production-restart workflow limits dangerous operations, but the immediate problem is a web-search call forced for every simple arithmetic question. Adjust tool_choice so no external tool is compulsory for requests that can be answered locally; a restart gate leaves the unnecessary search intact.

Validating arguments after selection is still necessary whenever a real tool call occurs. It cannot eliminate the forced external search before one is selected, however. Use optional or automatic tool choice for sensitive local computations and validate only those tool calls that remain justified.

Correlating multiple tool results by tool_use IDs prevents swapped responses, but this caller has already selected a schema tool and ignores whether arguments satisfy its input contract. Validate required fields and business invariants before acting; correct correlation cannot make invalid payloads safe.

Omitting delete tools is a least-privilege measure for read-only review. The case instead describes invalid order arguments on a selected schema tool. Even an allowed and non-destructive operation needs input-schema and business-rule checks before the application consumes or acts on its result.

Forcing a tool is appropriate only when its call is required. This alternative does not establish how to avoid assuming forced tool use guarantees correct data in the stated workflow.

Tool choice ensures the path, not correctness of the fields. This is not a substitute for “Match each result to its tool_use identifier rather than relying on arrival order”; that control is necessary in the stated circumstances. Correlate every asynchronous completion with its tool_use_id or a stable application-assigned request ID, and persist that association through aggregation.

Not forcing unnecessary tool calls improves privacy and cost, but the two requested tools are already appropriate and finished in reverse order. A tool-choice setting does not map their outputs. Preserve each result's originating tool_use identifier rather than assuming completion order matches invocation order.

Discovery metadata determines whether a model can select the appropriate capability. That addresses a different part of the system, not the requirement to correlate parallel tool responses by invocation identity.

Discovery metadata determines whether a model can select the appropriate capability. This alternative does not establish how to gate high-risk tools outside the default role in the stated workflow.

Restricting fact-checkers to read tools is sound, but the dangerous capability here is restarting production from a code-search context. Keep restarts behind a separate authenticated workflow with explicit approval; a general fact-check permission rule does not isolate the service-restart action.

Forcing a tool is appropriate only when its call is required. It would leave the stated need to gate high-risk tools outside the default role unresolved.

A production restart is a privileged side effect and should not live in an ordinary research or search tool catalog merely because an analyst sometimes needs it. The proposed option cannot provide the specific “Avoid claiming fresh external verification and disclose the missing tool capability” behavior that the case requires. If a live source cannot be queried, the agent should clearly distinguish stable background knowledge from information needing current verification.

Discovery metadata determines whether a model can select the appropriate capability. The scenario instead requires a way to avoid inventing external results when tools are unavailable.

Model text is not evidence of an external side effect. Although useful elsewhere, it is not the direct mechanism to avoid inventing external results when tools are unavailable.

Removing delete permissions from reviewers prevents accidental destructive changes, but expensive search overuse can occur entirely with read-only tools. Set per-task invocation budgets and evidence sufficiency criteria so the coordinator stops searching after the answer is already supported.

A model cannot infer current database state without access. That addresses a different part of the system, not the requirement to limit unnecessary tool invocation after adequate evidence.

Automatic selection reduces unneeded forced calls, yet an agent can still choose another expensive search repeatedly after sufficient evidence is available. Enforce tool-call limits and completion criteria in the controller rather than relying on the model to stop voluntarily.

A model cannot infer current database state without access. Although useful elsewhere, it is not the direct mechanism to expose callable MCP tools with clear discovery metadata.

Model text is not evidence of an external side effect. This alternative does not establish how to expose callable MCP tools with clear discovery metadata in the stated workflow.

Separating production restarts protects high-risk actions, but this MCP server exposes a useful tool that clients cannot discover reliably. Publish a specific tool name, purpose and required arguments through discovery metadata. Tool isolation does not fix missing descriptions and selection cues.