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

Annotations already declare destructiveHint=true, readOnlyHint=false, and idempotentHint=false. The description adds the operation type ('sensitive write') and the confirm=true precondition, which is useful. But it says nothing about what gets destroyed or irreversibility beyond the annotations, so it only marginally exceeds the annotation baseline.

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?

Two short sentences with no waste; the verb-resource statement comes first and the constraint follows. Efficient and front-loaded.

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?

For a destructive, non-idempotent, open-world mutation with 13 params at 46% schema coverage and no output schema, the description is thin. It omits what fields are updatable, how status changes behave, and what happens to the request after update.

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 description coverage is only 46% with 13 parameters. The description does not explain the six undocumented fields (to, from, notes, status, user_id, policy_id) or their semantics. It only echoes the confirm requirement that the schema already documents with a const and description.

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?

States a specific verb and resource ('Updates a time off request'), which clearly distinguishes it from siblings like create_timeoff, delete_timeoff, get_timeoff, and approve_timeoff. It also names the backing endpoint, adding precision.

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?

No guidance about when to use this versus approve_timeoff (a status transition) or delete_timeoff. The confirm requirement is stated, but no when-not-to-use or alternative-routing guidance is offered.

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