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

With no annotations, the description must disclose behavioral traits. It states it 'lists stored calls' (a read operation) and mentions 'benchmark-adjusted outcome' and 'given horizon,' which describes output behavior. However, it doesn't explicitly state it's read-only or has no side effects, nor does it mention any authentication or rate limits.

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?

Two sentences plus a short disclaimer, with the core purpose front-loaded. No wasted words.

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 2-parameter tool with an output schema, the description covers the main purpose and output. It doesn't mention any limitations like 'stored calls only' or whether the tool is read-only, but given the output schema, it's acceptable. However, since annotations are absent, a note about safety would improve completeness.

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 schema has 0% description coverage, so the description must compensate. It mentions 'given horizon' which relates to horizon_days, providing some meaning. However, it doesn't explain the ticker parameter or the default behavior of horizon_days, though the schema itself provides defaults.

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 opens with a direct question that captures the tool's purpose: listing analyst calls for a ticker and their outcomes. It clearly distinguishes from analyst-centric tools by focusing on the ticker, and mentions specific details like 'benchmark-adjusted outcome' and 'given horizon.'

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 usage context: 'Which analysts called this ticker' indicates this is for ticker-centric queries. It doesn't explicitly exclude analyst-centric tools, but the context is clear enough for an agent to route appropriately among the siblings.

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