prepare_fixture

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

Annotations cover the safety profile (readOnlyHint true, destructiveHint false, idempotentHint true), so the baseline is lower. The description adds meaningful context by stating it validates and expands deterministically and that it does NOT run the fixture—an important behavioral disclosure distinguishing preparation from execution.

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?

A single sentence, zero wasted words, immediately front-loaded with the core action. It conveys the key purpose and the critical non-execution qualifier efficiently.

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?

The tool has an output schema and 4 parameters with 0% schema documentation coverage. With no parameter semantics provided and no usage guidance, the description leaves the agent to guess at what 'validate' and 'expand' concretely produce. It's adequate for distinguishing itself from run_fixture but insufficient to guide config decisions for the four parameters.

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%, so the description must compensate, but it provides no parameter information at all. The four parameters (analysts, as_of_date, risk_rounds, debate_rounds) are entirely unexplained in the description text. Unlike the get_calls calibration example where schema coverage was 100%, here the description fails to bridge the 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?

The description states the verb 'Validate and expand' with the resource 'the deterministic ORCL fixture' and clarifies it does so 'without running it.' This clearly distinguishes it from sibling run_fixture, which actually executes the fixture. It could be slightly more specific about what 'expand' entails operationally,

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 indicates the tool prepares/validates a fixture without executing it, which contrasts with run_fixture. But there is no explicit when-to-use guidance, no enumeration of alternatives, and no mention of when an agent should choose this over run_fixture or prepare_host_run. The distinction from the run family is implied but not explicitly articulated.

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