compare_gamma_with_price

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

No annotations are provided, so the description must describe behavior on its own. It hints at a dependency on persisted data ('persisted GEX') but does not disclose whether the operation is read-only, what happens with too few observations, how history_dir affects execution, or what output to expect.

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 a single efficient sentence with no filler or repetition. It is front-loaded with the verb and object, but it is so terse that some of the missing behavioral context could have been included without hurting readability.

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?

With no annotations, no output schema, and four parameters including a nullable path and an integer threshold, this description is not enough for correct invocation. An agent would not know valid values for history_dir, the meaning of min_observations, or the shape of the comparison result.

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%, and the description only maps to the horizon concept ('selected horizon'). The required symbol, history_dir, and min_observations parameters are left unexplained, forcing the agent to guess at their formats and effects.

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 a specific verb ('Compare'), a specific resource ('persisted GEX'), and the comparison target ('daily forward returns at a selected horizon'). This is strong enough to distinguish it from sibling get/calculate/audit tools, though it never explicitly names an alternative or exclusion.

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?

There is no guidance on when to prefer this tool over siblings such as get_gamma_exposure, get_gamma_snapshot, or audit_gamma_history. The description only states what the tool does, not the condition under which an agent should choose it.

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