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

Annotations already cover the safety profile (readOnlyHint, idempotentHint, non-destructive, closed-world). The description does add genuine context beyond them by disclosing that the response merges two distinct sets — configured public paths and empirically observed served routes — which an agent could not infer from annotations. It stops short of saying how large the response can be, whether observed routes are time-windowed, or what happens for a project with no traffic.

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 front-loaded sentence with no filler; the primary resource is named first and the secondary output category is appended as a clarifying clause. Nothing could be removed without losing 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?

For a one-parameter read tool with no output schema, the definition gives enough to call it and to anticipate the two kinds of data returned. It would be stronger if it sketched the result shape (e.g., whether paths and observed routes are separate arrays, and any size limits), but nothing essential is missing.

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 there is only one required parameter, so the schema already defines project_id fully. The description implies project scoping but adds no format, validation, or lookup detail beyond what the schema supplies; baseline 3 applies.

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 (List) and a specific resource (a project's public/unauthenticated paths), and adds a second output category (observed routes the app serves). This clearly separates it from the mutating sibling set_public_paths, though it never names that sibling explicitly.

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?

There is no when-to-use or when-not-to-use guidance: nothing tells the agent whether to call this before set_public_paths, after a deploy, or alongside get_project_access. Usage is only implied by the purpose sentence.

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