Grabs By Indexer

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

With no annotations, the description carries the full burden of behavioral transparency, but it only states 'Count grab events by indexer'. It does not disclose whether the tool is read-only, paginated, or requires permissions, nor does it explain the type of output (aggregated counts vs raw data). The parameters suggest aggregation but the description does not confirm.

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 extremely concise (one sentence), but it is under-specified and fails to provide necessary detail. While it front-loads the purpose, it omits critical information about parameters and usage, making it insufficient for effective tool selection and invocation.

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?

Given the complexity of 11 parameters, no annotations, and no output schema, the description is severely incomplete. It does not explain what 'grab events' are, how the count is performed, or what the response format looks like. The tool is fully dependent on its name and title for understanding.

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%, meaning no parameter descriptions are provided in the schema, and the tool description offers no information about the 11 parameters. The description does not explain what each parameter does, so the agent has no guidance on how to use them correctly.

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 'Count grab events by indexer' clearly states the action (counting grab events) and the grouping dimension (by indexer). It is specific about what the tool does, but does not distinguish it from siblings like 'failed_downloads_by_indexer' or 'download_volume_by_indexer' which also count by indexer.

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 use this tool versus the many similar sibling tools, such as 'failed_downloads_by_indexer' or 'download_volume_by_indexer'. The description does not mention prerequisites, exclusions, or context for usage.

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