create_feeds_item_by_item_id_open

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

Annotations tell us the operation is not read-only, is idempotent, and is not destructive, but the description adds little behavioral context beyond the vague "Create or act." It does not explain what side effect occurs, whether authentication is required, or what retrying the operation might imply. No contradiction with annotations exists, but the description carries almost no behavioral weight.

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 short and includes the endpoint and parameter list in a scannable format. The pointer to the GET/schema endpoint is useful and avoids duplicating schema details. Minor waste exists in the vague "Create or act" phrasing, but overall it is compact.

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?

Even though an output schema exists, the input contract is underspecified: body is a free-form object and the description defers entirely to other endpoints. The tool's actual purpose remains unclear, and there is no guidance about which feed items are valid or what "open" means in this domain. This is not enough context for an agent to use the tool confidently.

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%, so the description must compensate, but it only labels item_id as a path parameter and body as a request payload. It directs agents to read a GET or /schema endpoint for body fields, which is helpful but does not explain the expected fields or their meaning. The description fails to give meaningful semantics 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 description says "Create or act on item open," which is vague and essentially restates the tool name without explaining what opening an item means. The endpoint path suggests a POST to mark an item as open, but the description never states the effect or resource semantics clearly. It does not distinguish this from sibling tools like create_feeds_by_id_close or create_feeds_collection_by_collection_id_open.

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 sibling feed/open/close tools. The instruction to read the matching GET or /schema endpoint is about payload discovery, not about choosing this tool over alternatives. The description provides no context for when this action is appropriate.

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