Check whether a closure originates from the executor

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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so safety is covered. The description adds some non-redundant context (cost=medium, prerequisites active-client/resolved-target, 'structured-observation' output), but 'Safety: read-only' merely restates the annotations and no failure mode or return shape is explained.

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-loading the aliases is useful, but the description is a dense metadata block padded with fields that duplicate structured data (Safety/read-only, Capabilities, Produces) and a generic 'inspect tool-schema on failure' fallback. Roughly half the sentences restate annotations or schema rather than adding value.

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 low-complexity, two-parameter predicate with full schema coverage and rich annotations, the description supplies the needed extras: aliases, prerequisites, phase, and cost. No output schema exists so return values need not be documented, though the relation to sibling closure-classification tools is the one notable gap.

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 coverage is 100% and both parameters carry their own descriptions, so the schema does the heavy lifting. The description only repeats the signature ({ functionPath, threadContext? }) without adding format, semantics, or examples beyond what the schema already states, 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 predicate: distinguishing executor-created closures from game closures, with the aliases isexecutorclosure/checkclosure/isourclosure. It is clear what the tool answers, but it never distinguishes itself from close siblings like is-c-closure, is-l-closure, or is-new-c-closure, which an agent selecting among closure-inspection tools would need.

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 'Requires: active-client, resolved-target' line implies a precondition context, and 'Phase: observe' hints at where it fits in a workflow. However, there is no explicit when-to-use/when-not-to-use statement or comparison to the alternative closure-classification tools, leaving selection largely to inference.

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