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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint=false and destructiveHint=false, so the safety profile is covered. The description adds value beyond those annotations by disclosing what the result contains (endpoint and call counts) and that it enumerates the whole project. It stops short of mentioning pagination or result ordering, but that is a minor gap given the rich annotation coverage.

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 tight sentences: the resource scope and payload first, then the usage trigger, then the disambiguation pointer. Every sentence earns its place with no filler.

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?

There is no output schema, so the description does carry return-value burden and it does so by naming the fields returned (services with endpoint and call counts). Combined with the annotated safety profile and full schema coverage, an agent has enough to call it correctly; only pagination/volume behavior is unstated.

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% and both parameters are fully documented there (repo resolution and project slug auto-resolution). The description adds no syntax or format detail beyond the schema, so the baseline 3 applies. Note both parameters are optional, which the schema already conveys.

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 (list every service in the project) plus the returned fields (endpoint and call counts). It also explicitly differentiates from the sibling get_service_graph by naming it, so an agent can disambiguate without opening the schema.

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?

Gives an explicit trigger condition ('when unsure what exists or which repo owns a name') and routes the call-graph use case to a named alternative (get_service_graph). Both when-to-use and when-to-use-something-else are covered.

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