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

Annotations already declare readOnlyHint, openWorldHint, idempotentHint, and destructiveHint=false, covering the safety profile. The description reinforces this by stating it never creates state, signs, or submits, and adds that it reads an Ed25519-signed manifest and safety-bundle binding, plus the 'call once' guidance which implies idempotency. This adds value beyond the annotations without contradicting them.

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?

The description is two sentences, front-loaded with the core purpose and followed by a concrete usage example. Every sentence contributes meaningful information without redundancy, and the structure is clean and scannable.

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?

For a simple read-only tool with no parameters and an existing output schema, the description is complete. It explains what the tool reads, when to call it, and its safety guarantees. The presence of an output schema means the description need not detail return values, and the guidance covers the essential usage context.

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 has zero parameters, so the input schema is trivially covered (100%). The description provides no parameter details because none exist, and per the baseline for 0-parameter tools, this is appropriate. No further explanation is needed.

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 clearly states the tool reads an Ed25519-signed release manifest and safety-bundle binding, which is a specific verb-resource pair. It distinguishes itself from siblings by emphasizing it's a verification step before preparation, and explicitly notes it never creates state, signs, or submits. However, it does not name any sibling tool to contrast with, so differentiation is implicit rather than explicit.

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?

The description gives clear context: call this before preparing an action and once to verify current release and contract pins. It implies the tool is a prerequisite step and safe to use repeatedly, but it does not explicitly state when to avoid using it or mention alternative tools. The guidance is useful but not exhaustive.

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