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

readOnlyHint=true is already supplied, so safety is covered. The description adds contextual behavior: newest-first ordering, inclusion of release notes, the endpoint URL pattern, and that it reports which version the current endpoint serves. These are useful details beyond the annotation, though return format details are somewhat redundant without an output schema.

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 efficient sentences: what it lists, how items are presented, and a routing alternative. Front-loaded with the tool's purpose. No wasted words.

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?

A no-param, read-only listing tool with no output schema. The description covers what is returned and how it is ordered, and explicitly points to the alternative. Nothing essential for correct invocation 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?

Zero parameters, so baseline is 4 per rubric. No param information is needed or provided, and the description correctly focuses on output semantics rather than input params.

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?

Specific verb+resource: 'Lists the FrontMCP releases these docs cover.' Clearly distinguishes from sibling resolve_version by naming it for the opposite operation. An agent can confidently identify this as the version-listing tool.

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?

Explicitly names the alternative 'resolve_version' and gives the condition to use it: 'To find the version a project uses, call resolve_version.' This provides both when-to-use and when-not-to-use guidance.

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