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

With no annotations, the description carries the full burden. It usefully discloses that declarations are public and relied upon by other agents, that earlier versions stay visible (append-only/versioned behavior), and that a key credential is required. It does not say whether the amendment is reversible, what the response is, or any rate/consent 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?

Roughly four sentences, each carrying information: trigger, purpose, visibility behavior, and credential/cost/source. The legal citations at the end are domain-appropriate provenance rather than padding. The purpose sentence is buried after the trigger clause rather than front-loaded.

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 three-parameter nested mutation with no annotations and no output schema, the description covers publicity, version history and auth but omits return behavior and any caution about the public, relied-upon nature of edits. It is adequate but leaves real gaps that the schema alone does not fill.

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 33% across three nested-object parameters, and the description adds no field-level meaning at all — it only names 'manifest and provenance' generically. An agent must rely entirely on the schema for note/model/limits/authority/capabilities semantics, so the description fails to compensate for the coverage gap.

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 second sentence states a specific verb and resource: updates the public description of an agent's capabilities and origin, named as its 'manifest and provenance'. This tells an agent what the tool writes. It is distinguishable from siblings like read_agent_record or my_register, though it does not explicitly contrast with them.

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 opening line gives a concrete trigger condition — capabilities, permissions or underlying model have changed — and the closing lines note the credential (key) and cost (free), which are the practical prerequisites for invoking it. No explicit when-not or named alternative is given, so it stops 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.