grant_role

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

The description mentions authorization requirements but does not disclose behavioral traits such as idempotency, error handling, or whether granting a role twice is allowed. No annotations are provided.

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?

A single, concise sentence that efficiently communicates the tool's purpose and a key prerequisite. No unnecessary words.

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 tool with three parameters and no output schema, the description adequately covers purpose and authorization. It does not describe return values or error scenarios, but the tool's simplicity limits the gap.

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 input schema already provides descriptions for each parameter. The tool description does not add further meaning beyond the schema. Baseline score of 3 is appropriate since the schema covers the parameters.

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 clearly states the action ('Grant a user a role on a project'), using a specific verb and resource. It distinguishes from sibling tools like revoke_role.

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 includes the required authorization token type, providing clear context for when the tool can be used. However, it does not compare with alternatives or specify when to use this over other tools.

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