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

With no annotations, the description carries the full burden, and it does disclose a real behavioral trait: the X-API-Key requirement and the api_key argument fallback for header-less clients. However, it says nothing about read-only semantics, permission scoping, or what happens when the project id does not exist.

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?

Three compact sentences with the core purpose front-loaded; nothing is padded. It could be tighter by folding the parenthetical API-key generation note, but it stays readable.

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 get-by-id with a fully documented schema and no output schema, the auth coverage is the main gap-filler. It stops short of explaining not-found behavior or returned fields, which leaves a mild hole an agent might need.

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%, so the schema already documents both project_id and the api_key fallback, and the description largely restates the api_key note. Baseline 3 applies; no additional syntax or format detail is added.

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 ('Returns a specific project by id'), so the agent knows this is a single-item lookup. It does not explicitly contrast with the sibling list_projects, but the 'by id' phrasing implicitly distinguishes retrieval-by-key from enumeration.

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 authentication instructions but no guidance on when to use this tool versus list_projects or the other get_* siblings. There are no stated prerequisites, exclusions, or error conditions that would help an agent choose.

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