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

With no annotations, the description carries the full behavioral burden. It says 'update' but never discloses whether this is a partial or full replacement, what happens to fields omitted from the call, whether permissions or ownership are required, or that the operation is a mutation with any side effects.

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 front-loaded sentence with zero filler, and the field list is packed economically after the em dash. It is arguably too terse for a five-parameter mutation tool, but nothing is wasted.

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?

An output schema exists so return values need not be described, but for a mutation tool with no annotations and no schema descriptions the definition is thin. Partial-update semantics, behavior on omitted fields, and permission requirements are all unaddressed.

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%, so the description must compensate, and it does partially: it names the three updatable fields and adds the genuinely useful format note that tags are comma-separated. However, the two required parameters (household_id, doc_id) are unexplained, and it does not clarify that the listed fields are optional while the identifiers are mandatory.

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 (update) and resource (document) and narrows the scope to metadata fields — description, category, tags. This implicitly separates it from content-oriented siblings like upload_document or extract_document_data, but it never names an alternative or explicitly rules out document content changes.

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?

No when-to-use, when-not-to-use, or alternative-tool guidance is given. The 'metadata' qualifier hints at scope but does not tell an agent whether to reach for this versus upload_document, delete_document, or create_share_link.

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