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

Annotations already cover the safety profile (readOnlyHint=true, idempotentHint=true, destructiveHint=false), so the bar is lower, yet the description still adds real behavioral value by enumerating what the response contains: connected accounts, remaining calls, approval queue, tool inventory. It does not describe freshness or whether 'remaining calls' implies quota/rate-limit semantics, which is the only notable gap.

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 clauses and a directive, with the payoff front-loaded before the call-to-action. Every sentence earns its place and there is no filler or restating of the title.

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?

An output schema exists, so return values need not be spelled out, and the description covers the orientation role fully for a zero-parameter bootstrap tool. The only thin spot is that 'remaining calls' is left undefined (quota vs. API calls), which slightly limits interpretation of the returned data.

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 per the rubric the baseline is 4 — there is nothing for the description to disambiguate, and it correctly spends no words on parameter detail.

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 precisely what the tool surfaces — connected accounts, remaining calls, pending approvals, and available tools — which is a specific, non-generic payload, and it is clearly distinguishable from every sibling (all of which are focused single-resource tools). It lacks a crisp action verb like 'summarize' or 'report', but the resource and scope are unambiguous.

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 this first' is an explicit, directive usage instruction that tells the agent exactly when to invoke it relative to all 50+ siblings. There are no exclusions or alternatives named, but as the designated entry point none are needed — the guidance is clear rather than inferred.

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