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

Annotations already mark this as destructive, idempotent, open-world, and non-read-only, so the description's job is to add context. It adds a permission gate (owner/admin) and clarifies the result with 'No credential is returned,' which is useful. However, it does not disclose what gets overwritten or removed by the destructive action, or any other side effects, leaving the serious destructive hint largely unelaborated.

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 three short sentences with no filler: purpose, permission requirement, and result expectation. It is front-loaded with the core action and every sentence adds distinct 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 destructive, open-world mutation with no output schema, this is thin. It does not state who receives the EDITOR access (no user/principal parameter exists), what the return value is (only what it is not), or the scope of the destructive effect. The idempotencyKey and permission note are helpful, but the missing subject and side-effect details leave an agent under-informed.

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?

Both parameters have complete schema descriptions (100% coverage): projectId's provenance and idempotencyKey's retry semantics are documented in the schema. The tool description only refers to 'this dossier' for projectId and does not add information about parameters beyond that. With full schema coverage, the baseline of 3 is appropriate.

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 opens with a specific verb and resource: 'Store project-scoped EDITOR access on the server for this dossier.' This clearly communicates a mutation targeting a project and the 'EDITOR access' phrase distinguishes it from read/query access tools. It lacks an explicit comparison to sibling access-related tools, and 'this dossier' leaves the recipient of access implicit, so it is not a 5.

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 only usage guidance is the prerequisite 'Requires a workspace owner or administrator.' There is no statement of when to choose this over related siblings like read_dossier_access or apply_dossier_library_access, and no when-not-to-use condition. An agent is left to infer that it should call this when needing to grant editor access, without context on alternatives.

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