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

Annotations declare it is a non-read-only, non-destructive, non-idempotent mutation. The description adds real value beyond that: a uniqueness check that prevents accidental project merges, a cascade to all usages, and an explicit permission requirement. It stops short of saying what happens to the old name in history or how failures surface.

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 short sentences, front-loaded with the core action and scope, followed by the collision guard and the permission requirement. Every sentence carries distinct information 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?

For a two-parameter mutation with no output schema and full schema coverage, the description supplies the important behavioral facts (cascade scope, name-collision refusal, permission need). Minor gaps remain around what the return value or error looks like and how the rename interacts with existing references.

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 coverage is 100%, and the schema already documents both parameters ('The new name.' / 'The current name.'). The description adds no format, length, or validation detail beyond what the schema provides, so the 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 (rename) plus resource (project) and clarifies scope with 'everywhere it is used,' which signals a cascade update rather than a local edit. It does not, however, distinguish itself from the sibling fenbs_update_project, leaving the agent to infer which one to pick.

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?

Usage is implied by the constraint set ('Refuses a name another project already has') and the prerequisite ('Needs permission to change tasks'), but there is no explicit statement of when to use this versus fenbs_update_project or fenbs_add_project. The agent gets guardrails but not routing.

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