messages.validate

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the description does not need to restate safety. However, it adds no behavioral detail about what validation entails, whether failures are silent or throw, or what traceability guarantees exist, so it offers little beyond the annotations.

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 a single sentence with no redundant content. It is front-loaded with the action and resource, though the terms 'traceable operational' add vagueness rather than precise meaning.

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?

Given the opaque nested object and lack of an output schema, the description is incomplete. An agent still does not know what content the message must contain, what a successful validation looks like, or how the result is returned. The annotations cover the safety profile but not the operational semantics.

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 description coverage is 0%, and the only parameter, 'message', is an opaque object with no documented nested properties. The description hints that the message should be an 'envelope', but it does not explain the required fields, traceability metadata, or accepted formats, so the agent cannot construct a valid input beyond providing any object.

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 a clear verb ('validate') and names a resource ('traceable operational message envelope'), but the resource is jargon and is never defined. It does not distinguish this from sibling tools like audit.verify or catalog.inspect, which could also involve validation-style checks.

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 no guidance on when to use this tool or when to prefer one of the sibling tools. There are no exclusions, prerequisites, or scenario-based instructions, leaving the agent to infer applicability from the tool's name alone.

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