Who this token is

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

Annotations only establish readOnlyHint/destructiveHint, but the description goes well beyond them: it explains the distinction between agentGrants (token capability) and permissions (owner capability), states that a tool works only when both allow it, and gives a conditional action for mcp.outdated (warn the user before filing a bug). That is substantive operational context an agent could not infer from structured fields.

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?

Front-loaded with what the tool is and the call-first directive, then earns each remaining sentence with distinct information. It is dense and slightly long, but no sentence is 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?

There is no output schema, so the description carries the burden of explaining return values — and it does, covering agentGrants, permissions, and the mcp object including the outdated flag. Nothing material is left for the agent to guess.

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 takes zero parameters, so the baseline is 4. The description instead spends its budget on the semantics of the returned fields, which is the right call and more valuable than parameter prose would be.

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 names a specific resource and scope: 'the account this token acts as and the workspaces it can see.' That is unmistakably distinct from every sibling (projects, posts, categories, keys), none of which report token identity.

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 gives an explicit sequencing rule — 'Call this first in a new conversation' — plus a rationale (confirms the token works and names the workspace). There is no when-not or named alternative, but no sibling serves as a substitute for identity discovery, so the guidance is effectively complete.

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