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

With no annotations, the description carries the full behavioral burden. It discloses one important constraint ('key-swap rejected') but omits permissions, idempotency, uniqueness of producer_id, side effects, and return behavior for a mutation operation.

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 compact sentence with no wasted words, and the constraint is front-loaded. However, the brace-list style is terse and could be clearer without adding much length.

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?

The tool has three required parameters, no annotations, no output schema, and 0% schema description coverage, yet the description only covers basic purpose and one rejection rule. It is insufficient for an agent to invoke the tool confidently in all relevant cases.

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 0%, so the description must compensate. It identifies all three parameters and gives the public_key format (Ed25519 hex), but producer_id format and the meaning/content of types[] remain unexplained.

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 and resource: 'Register a producer'. The embedded field list and 'key-swap rejected' further specify the operation, but it does not explicitly distinguish itself from siblings, though none appear to be registration tools.

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?

Provides no when-to-use guidance, no prerequisites, and no alternatives. The agent must infer that this is used to register a new producer and cannot tell when to choose a different tool.

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