Export run evidence

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

Annotations already cover the safety profile (readOnlyHint=true, destructiveHint=false, openWorldHint=true). The description adds real value beyond them: visibility constraints ('No public Arena user can see this data'), the paper-trading-only scope, and the paper_execution_v1 fill model with a disclosed execution cost referenced via executionModel in quote/trade results.

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?

Front-loaded with the core purpose and bundle contents, then scoped by the privacy and paper-trading sentences. Slightly dense, and the trailing execution-model sentence is only loosely tied to the export action, but nothing 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?

An output schema exists so return values need not be explained, and the description characterizes the bundle contents, access restrictions, and execution model. For a read-only export with a fully documented nested schema, this is close to complete.

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 100%, so both the runId and the nested agentTrace fields are already documented with lengths, ranges, and the chain-of-thought/secrets warning. The description only restates agentTrace.runId, adding no meaning beyond the schema, so the baseline 3 applies.

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?

States a specific verb (Export) and resource (a private reproducibility bundle) keyed to agentTrace.runId, and enumerates the bundle contents, so the agent knows what it produces. It does not, however, distinguish itself from the close sibling export_agent_ledger, which also exports ledger-derived data.

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 context is implied rather than stated: 'Paper trading only' and the privacy note suggest when it applies, but there is no explicit when-to-use versus export_agent_ledger or get_agent_ledger, and no exclusions or prerequisites beyond the runId requirement.

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