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

Annotations already declare readOnlyHint=true, idempotentHint=true and destructiveHint=false, so 'Limitations: read-only' merely restates structured data rather than adding new behavioral context. The only extra signal is the raw endpoint path, with no mention of pagination, rate limits, or result shape.

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, front-loaded sentences that get to the point immediately. The trailing 'Limitations: read-only' clause is somewhat wasteful since it duplicates annotations, but overall it is tight.

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 simple list endpoint with no output schema and fully-covered parameters, the description is minimally adequate, but it omits pagination behavior, expected result contents, and how to scope by account, all of which an agent would benefit from.

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 100% (7 params fully documented, including page and account_id conditions), so the schema carries the burden and the description adds nothing about parameters. Baseline 3 applies when the schema does the heavy lifting.

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 (Lists) and resource (time off policies) and cites the concrete endpoint GET /timeoffs/policies. It does not explicitly differentiate from the sibling get_timeoff_policy, but the plural/singular distinction is inferable from the name and title.

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?

The description gives no when-to-use context, no mention of when to prefer get_timeoff_policy for a single policy, and no guidance on pagination or workspace scoping. Only the read-only note hints at constraints.

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