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

The annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is fully covered. The description adds what the call surfaces (coverage, ready-to-use arguments, freshness, citation format), which is useful orientation context, but with an output schema present it needn't detail return values. Adequate but not rich beyond 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?

A single sentence, front-loaded with the imperative 'Call first' followed by an enumerated payload list. Every clause earns its place with no 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?

With an output schema present and zero parameters, the description need not explain return values or inputs. Rich annotations cover safety, and the description tells the agent what to expect and that it should be called first — sufficient for a bootstrapping tool.

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 of 4 applies. There is nothing for the description to disambiguate, and 'ready arguments' hints that the returned calls come pre-populated.

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: an orientation/onboarding payload containing coverage, the 5 most useful calls with ready arguments, data freshness, and citation guidance. 'Call first' makes its role distinct from the data-retrieval siblings, though the verb is implicit rather than stated.

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?

'Call first' is an explicit, unambiguous usage directive that no sibling claims, telling the agent when to invoke it relative to the other 26 tools. It does not state any when-not conditions, but for a universal entry point those are largely unnecessary.

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