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

With no annotations, the description carries the burden and delivers real behavioral context: non-filing departments appear as missing, it does not fabricate notes, and it does not trigger a rollup. Missing only secondary traits like auth needs or rate limits, which are minor for a read.

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?

Three tight sentences, each earning its place, with the core action and parameter behavior front-loaded before the caveats.

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 formatting need not be explained, and the description covers the single parameter and the key behavioral quirks. Adequate for calling the tool correctly, though it could say more about the nature of the stored brief.

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% and the lone parameter is undocumented in the schema, so the description does the work: it specifies the YYYY-MM-DD format and the omit-for-latest default behavior. That meaningfully compensates 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?

States a specific verb (Return) and resource (stored CEO brief) and immediately clarifies the negative scope: it does not invent notes and does not run the rollup. That negative framing distinguishes it from any generate/write sibling such as submit_daily_note without needing the schema.

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?

Explains the key conditional: pass note_date for a specific day, omit it to get the latest stored brief. It does not name an explicit alternative tool or state exclusions beyond the rollup remark, so context is clear but not fully routed.

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