Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Beyond the destructiveHint/idempotentHint annotations, it discloses irreversibility, cascade scope ('everything they collected'), and partial-failure semantics: an unknown or already-deleted id is returned in the result and does not block the remaining deletions. That is precisely the behavior an agent needs before calling a destructive batch tool.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Three labeled lines (Purpose, When, Cost) with the destructive scope front-loaded and zero filler. The cost line is unusual but earns its place by telling the agent the reply is cheap to inspect.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With an output schema present and annotations covering the safety profile, the description covers the key gaps: irreversibility, batch failure handling, and a token budget. 'Everything they collected' stays somewhat abstract about what dependent data is removed, which keeps it just short of complete.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% and the schema already documents the 1-10 array with its bounds; the description adds no format or selection detail. The schema's own pointer to monitor_list supplies the provenance. Baseline 3 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a specific verb and resource ('Delete saved monitors') and adds scope ('and everything they collected'), which tells an agent this is a cascading delete rather than a status change. It is clearly distinguishable from siblings like monitor_update or monitor_decide.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

It gives an explicit trigger ('Only when the user asks to delete them'), which excludes proactive or inferred deletion. It does not name an alternative for reversible actions (e.g., monitor_update to disable), so the when-not guidance is partial rather than complete.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.