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

Annotations already declare readOnlyHint, openWorldHint, idempotentHint, and destructiveHint=false, so the safety profile is covered. The description adds the 'compressed' nature and single-date scope, but it does not disclose what the tape contains, whether decompression is needed, or any response-size or pagination 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?

The description is one short, front-loaded sentence with no filler. 'Compressed' and the date-format parenthetical each add useful context, and nothing included 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?

For a simple single-parameter, read-only, idempotent tool with rich annotations and full schema coverage, the description is close to sufficient. However, there is no output schema and no explanation of what a 'regime segment tape' actually contains, so the agent still has limited ability to predict the return value.

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 only parameter, date, is fully documented in the schema with a pattern, format description, and pointer to list_history_dates. The description adds only the phrase 'one replay date (YYYY-MM-DD)', which is redundant with the schema, so a baseline score of 3 is appropriate.

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 identifies a specific resource—a compressed dealer-regime segment tape—and scopes it to one replay date. It is not a tautology of the name/title and is distinguishable from siblings like get_regime and get_day, though it lacks an explicit verb like 'returns' or 'retrieves.'

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 implies the tool is used to get a date-specific regime segment tape, and the schema points to list_history_dates for valid date values. However, it does not explicitly compare this tool to siblings such as get_regime or get_market_structure, nor does it say when not to use it.

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