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

The description says 'Replace' which implies overwriting and thus destruction of the old requirement set, but the annotations set destructiveHint=false. This is a direct contradiction. The description does add the 'unlocked' precondition and explains the confirmed flag, but the contradiction forces a score of 1.

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 extremely concise: two sentences, 20 words. It front-loads the main purpose and adds one clarifying detail. Every sentence serves a purpose.

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 complex update operation with a nested requirements array and no safety annotations, the description is too sparse. It does not mention the return value, error conditions, validation behavior, or permission requirements. It only gives the 'unlocked' prerequisite and a meaning for one field. The output schema exists but is not provided, so the description must carry more weight.

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 0%. The description only clarifies the meaning of the 'confirmed' flag within the requirements array, but does not explain project_id or other requirement fields. It fails to compensate for the lack of schema descriptions.

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 (Replace), the resource (structured requirement set), and a key condition (on an unlocked project revision). This is specific and distinguishes it from other project tools like get_project or validate_project.

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 a clear prerequisite by stating the operation targets an unlocked project revision. However, it does not explicitly compare with alternatives or state when not to use the tool, so it falls short of a 5.

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