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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so safety is covered. The description adds genuinely new context beyond that: the org is immutable and there is no override parameter, which explains why the tool takes no arguments and always returns the same grant-bound result.

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?

Two short sentences, no filler, with the scope/immutability constraint front-loaded. Every clause carries information about what the tool returns.

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?

With an output schema present, the return payload need not be described, and with zero parameters the calling surface is trivial. The description covers the essential behavioral contract; only failure behavior (e.g., an invalid or expired grant) is left unaddressed.

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 schema declares zero parameters, so there are no parameter semantics to document and the baseline is 4. The description's 'No org override' usefully confirms that no scoping argument is accepted.

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 states a specific resource (the grant) and enumerates what is returned: immutable org, scopes, supported analytics, and limits. That is enough to distinguish it from the run/job/stats siblings, though it never explicitly says 'use this instead of X' or names the retrieval verb.

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 only implied: an agent infers this is the tool to call when it needs to verify credential scope before other calls. 'No org override' hints at a constraint but there is no explicit when-to-use statement nor any named alternative among the siblings.

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