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

With no annotations, the description carries the full burden of behavioral disclosure. It conveys that the tool reports a point-in-time snapshot without modifying anything, but it does not state whether the data is live, cached, or how frequently it updates. The read-only nature is implicit from 'get_' and the informational wording, but not explicitly confirmed.

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 compact at two sentences and front-loads the core resource and purpose. The phrase 'which of its proposals Toolpin checks for' is slightly awkward, but every part of the description contributes useful information and there is no padding.

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 zero-parameter status tool, the description provides sufficient context on what the agent will learn: current revision, proposal checks, and migration level. There is no output schema, so the exact return shape is not specified, but the low complexity makes this a minor gap rather than a blocking one.

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 tool has zero parameters, so there is no parameter semantics for the description to clarify. Per the baseline for zero-parameter tools, this is a strong score; no parameter documentation is needed.

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 identifies the resource as the MCP specification revision and specifies the three distinct pieces of information returned: current revision, proposals Toolpin checks, and migration progress. This differentiates it from the server-focused siblings (get_server, get_server_tools, etc.) which operate at a different scope.

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?

It explicitly states when to use the tool: to learn the current revision and judge whether being on an older revision is unusual. It does not explicitly list exclusions or alternatives, but the standalone status purpose is clear enough that an agent would not confuse it with the sibling tools.

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