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

Annotations already establish readOnly, idempotent, non-destructive, closed-world behavior, and the description adds substantial context beyond that: closeout is null when none was started, cost figures are redacted for callers lacking project cost access, and access is allowed to project readers or named closeout reviewers.

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?

The description is front-loaded with the core action and avoids filler. The long enumeration of returned fields is dense but useful; it could be more structured, but every sentence contributes relevant information.

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 no output schema, the description does a good job describing the returned closeout record and its nullability/access behavior. The main gap is that the sole input parameter is not further explained, but annotations already carry the safety profile.

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?

The schema has one required parameter, projectId, with 0% schema description coverage. The description implies that projectId identifies the project whose closeout is being read, but it adds no format, sourcing, or validation detail to compensate for the missing schema documentation.

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 read operation on a well-defined resource: a project's closeout record. It enumerates the returned components (state, baseline, EVM summary, report, sign-offs, lessons, permitted next actions), making it clearly distinct from write-side siblings like initiate_closeout or submit_closeout_signoff.

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 explains who is allowed to call it, but does not explicitly state when to use this tool versus related alternatives such as initiate_closeout, update_closeout_lessons, or get_readiness_status. Usage is strongly implied by the read-only nature of the tool, but alternative routing is left to inference.

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