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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is known. The description adds the detail that the list includes status and URLs, which is useful but not a deeper behavioral trait. It does not contradict the annotations, so a 3 is appropriate.

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 a single, front-loaded sentence that directly conveys the tool's purpose. There is no fluff or repetition of the title, making it very concise.

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?

This is a simple list tool with no parameters, no output schema, and strong read-only annotations. The description adequately indicates what the tool returns (all projects with status and URLs). Despite lacking pagination or output format details, the simplicity of the tool and good annotation coverage make it sufficiently complete.

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?

The input schema is empty with zero parameters, making schema coverage trivially 100%. Per the baseline rule for zero-parameter tools, a score of 4 is warranted. The description does not need to explain parameters since there are none.

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 clearly states 'List all your RationalBloks projects with their status and URLs', using the specific verb 'list' and identifying the resource (projects). It distinguishes from siblings like 'get_project' and 'get_project_info' by emphasizing 'all' and the listing nature.

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 implies the tool is for listing all projects, which is a clear context. It does not explicitly exclude alternatives such as 'get_project' for a single project, but the word 'all' and the resource scope provide sufficient guidance. No explicit when-not-to-use or alternative names are given, so it scores a 4 rather than a 5.

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