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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and closed-world, so the safety profile is covered. The description adds genuinely useful context beyond that: the credential only matters for active rollout candidates, and credentials are never placed in URLs or echoed in errors. It still says nothing about size limits or result behavior for the returned projections.

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?

Purpose is front-loaded in the first clause, which is good, but the rest is dense jargon-heavy prose ('rules_projection/audit_summary', 'assigned caller') that takes several reads. It is compact, but the credential sentence is repeated in substance and the default projection is mentioned without grounding in the schema.

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?

No output schema exists, and with 4 params at 25% schema coverage the description carries real burden. It covers auth and the include semantics adequately but leaves slug/versionId meaning and the shape of the rules_projection/audit_summary/learning outputs unexplained.

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?

Schema coverage is only 25% (just the credential field), so the description has to compensate. It does clarify include's enum effect and the default projection, and reinforces the credential's scope, but slug and versionId get no semantics at all beyond their names.

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?

States a specific verb+resource: 'Read pinned public-version rules', with 'pinned public-version' narrowing scope beyond a generic version fetch. It does not name or differentiate itself from siblings like game_details or protocol_index, so an agent must infer the boundary, but the core action is 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?

Gives conditional usage rules: public versions need no credential while 'assigned active candidates require the assigned caller' and a private aa_ credential or connection Authorization. It also explains when to set include=learning/audit and what the default projection is. No alternative tool is named for related read tasks, which keeps it short of a 5.

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