List the path of a DataLens collection

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

Annotations already declare readOnlyHint, idempotentHint and openWorldHint, so the safety profile is covered. The description adds only a hint about response content (ancestor chain from root), and says nothing about ordering guarantees, whether the target collection itself is included, or permission behavior.

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 a single short fragment with no padding, so it is certainly concise and front-loaded. However, it reads as an incomplete sentence and omits the verb, leaving the statement of purpose under-formed rather than tight.

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?

There is no output schema, so the description is the only place return values could be characterized; it gestures at the result being an ancestor chain but does not describe the shape, fields, or ordering. For a simple 2-parameter read it is minimally adequate, not 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% and both parameters (collection_id, include_permissions_info) are documented in the schema, so the baseline is 3. The description adds no meaning beyond the schema for either parameter.

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 sentence names the resource (collections) and the scope of the result (root down to this one), so an agent can infer it returns an ancestry path. But it states the output content rather than an action verb, and it never distinguishes itself from close siblings such as datalens_collections_get or datalens_collections_list_by_ids.

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 when-to-use guidance, no stated preconditions, and no mention of any alternative tool. With ~200 siblings and several collection-listing tools, the absence of routing guidance is a real gap.

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