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

With no annotations, the description carries the full burden, and it does disclose meaningful behavior: verification fails for absent, changed or forged commands, and the event ID is treated as an untrusted hint. However, it says nothing about required signing authority, what a success result looks like, or reversibility/rate constraints.

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 tight sentences, front-loaded with the core verb and the security caveat second. Every sentence contributes; no filler or repetition of the name.

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 cryptographic verification tool with a nested object, no annotations, and no output schema, the description covers the verification intent and failure condition but omits the shape of a successful result and the meaning of the envelope fields. Adequate but with clear gaps.

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, and it does explain the critical semantic that event_id is an untrusted lookup hint. It adds nothing about the envelope's command, public_key, or signature fields, leaving the nested object's structure and expectations largely undocumented.

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 specific verb and resource — 'Verify the exact successful command event against a pinned signed header' — which tells the agent this is a verification/finality tool rather than a mutation or listing tool. It is jargon-heavy and does not explicitly distinguish itself from siblings like uain_native_state or uain_native_submit, keeping it short of a 5.

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?

There is no explicit when-to-use guidance or comparison to alternatives; the agent must infer that this is the finality-checking counterpart to uain_native_submit. The clause about forged commands refusing finality implies a validation context but is a behavioral statement, not usage routing.

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