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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It says 'Update' which implies mutation, but it does not disclose whether the update is partial or full replacement, whether it requires ownership verification, whether it is reversible, or what happens to unspecified fields. For a mutation tool with zero annotation coverage, this is a significant gap.

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 that front-loads the action and resource, then lists the key fields. It is concise and free of filler. It could be improved by adding usage context, but as a concise statement it earns a 4.

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 tool has 6 parameters, no annotations, no output schema, and many siblings, the description is incomplete. It does not explain the relationship between imageMode and profileImageCid, whether updates are additive or replace the entire profile, or what the response looks like. An agent would need to open the schema and guess at behavioral 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 100%, so the schema already documents all six parameters. The description adds a high-level summary of what fields are updatable (social links, website URL, IPFS avatar CID) but does not add meaning beyond the schema. Baseline 3 is appropriate when the schema does the heavy lifting.

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 ('Update') and resource ('decentralized identity profile metadata') and enumerates the fields it affects (social links, website URL, IPFS avatar CID). It is clear about what the tool does, though it does not explicitly distinguish itself from sibling tools like set_primary_domain or resolve_domain_identity. The verb and resource are specific enough that an agent can infer this is a mutation of profile metadata rather than a read or registration operation.

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 provides no guidance on when to use this tool versus alternatives. It does not mention that this is for updating an existing domain profile, nor does it exclude cases like setting a primary domain or transferring ownership. An agent would have to infer usage from the name and schema, which is insufficient for a tool with many siblings.

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