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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive, closed-world), so the description earns credit for adding domain behavior instead: the CFTC publishes Fridays at 3:30 pm Eastern for the prior Tuesday, and holidays shift the schedule. That is exactly the kind of rule an agent cannot derive from structured fields. It does not describe the shape of the returned timestamps or timezone formatting, which keeps it from a 5.

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?

One dense sentence, front-loaded with what the agent gets, followed by the scheduling rule that explains the timing values. The nested parenthetical is slightly awkward to parse but carries real information and no filler.

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 zero-parameter, read-only metadata tool with no output schema, the description supplies the returned facts and the publishing rule that governs them. Nothing an agent needs in order to call it and interpret the result is missing.

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?

The tool takes no parameters, so the baseline is 4. The description correctly implies no input is needed and notes availability at every level, which is consistent with the empty schema.

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 names the concrete outputs: which COT report is latest, its publication timestamp, and the next due date. That is a specific resource-plus-facts statement that separates it from data-retrieval siblings like get_latest_positions or get_history. It stops short of explicitly naming those siblings as alternatives.

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?

Usage is only implied: the agent can infer this is the timing/metadata tool to call before or alongside the position-fetching tools. There is no explicit when-to-use statement, no exclusion of alternatives, and no mention of prerequisites or ordering relative to siblings. 'Available at every level' is a weak hint that no scoping is required.

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