set_memo_attachments

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

With no annotations provided, the description carries the full behavioral burden. It does surface the single most important trait — that all existing attachments are replaced — which is the destructive/mutating behavior an agent must know. However, it does not disclose side effects on replaced attachment objects (deleted vs. orphaned), permissions required, or failure behavior.

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 10-word sentence with the core operation front-loaded and the distinguishing caveat in a tight parenthetical. Every word earns its place; no filler or redundancy.

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 low-complexity tool (2 simple params, no output schema), essential purpose and behavior are covered. Gaps remain: the structure of 'attachment objects' is undefined, return values are not described, and there is no indication of whether providing an empty array clears all attachments. Adequate but not thorough.

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 baseline is 3 with the schema doing the heavy lifting. The description adds no parameter-level detail; notably, it does not clarify whether the 'attachments' array expects IDs, full attachment objects, or URLs, which is a genuine ambiguity the schema also fails to resolve.

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 action (set attachments for a memo) with an explicit resource, and the parenthetical '(replaces all existing attachments)' adds the critical scope distinction that separates this from create_attachment and update_attachment. The verb 'set' is slightly generic, but the replacement context makes the purpose unambiguous.

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 explicit guidance on when to use this tool versus alternatives. The replacement wording implies this is for overwriting the full attachment set rather than appending, but it never names create_attachment as the alternative for additive operations or states a selection condition. An agent must infer usage from the parenthetical.

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