list_indexer

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

The annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false. The description adds no meaningful behavioral context beyond restating that this is a read operation and showing the GET endpoint. It does not contradict the annotations, but it also does not disclose additional behavior such as response shape, authorization needs, or collection scope.

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 short and front-loaded, but 'Read Indexer' is nearly redundant with the tool name. The HTTP path is the only substantive addition, and while there is no fluff, the description is under-specified rather than efficiently informative.

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 zero-parameter, read-only list endpoint with annotations and an output schema, the description is mostly sufficient. However, it does not clearly resolve whether this returns all indexers or a single indexer, and it lacks any pointer to get_indexer_by_id, leaving an ambiguity that could affect tool selection.

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 tool has zero parameters and the input schema is an empty object, so the schema fully covers parameter semantics. The description does not need to explain parameters, and the baseline of 4 is appropriate.

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 a verb ('Read') and a resource ('Indexer') and provides the HTTP endpoint, but it does not explicitly say it lists all indexers or distinguish it from get_indexer_by_id. 'Read Indexer' is close to a synonym of the tool name list_indexer and is somewhat vague.

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 about when to use this tool versus alternatives such as get_indexer_by_id, list_indexer_schema, or list_indexerflag. The description does not mention when it applies or when a different sibling tool should be used.

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