redis_lpop

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

With no annotations, the description carries full burden. It discloses the destructive nature (remove) and a conditional blocking behavior due to readOnly mode. However, it fails to mention behavior for edge cases such as when the key does not exist or the list is empty. The return type is also not specified.

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 concise sentence that efficiently conveys the core action and an important condition. It is front-loaded and free of unnecessary words, though it omits some behavioral details that could be included without much overhead.

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 absence of an output schema and annotations, the description should provide a more complete picture. It lacks information about return values, error handling, and specific edge cases (e.g., empty list or missing key). The connected blocking condition is mentioned but not fully explained.

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 description adds no information about the parameters beyond what is in the input schema. The schema already describes 'connectionId' but 'key' lacks description; however, the description does not clarify 'key' either. With 50% schema coverage, the description should compensate but does not.

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 clearly states the action: remove and return the first element of a list. It is specific and uses a standard Redis command name (lpop). However, it does not explicitly distinguish this tool from sibling tools like redis_rpop or redis_lpush, which have different behaviors.

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 description provides no guidance on when to use this tool versus alternatives. It mentions a blocking condition related to readOnly mode, but does not advise on when to choose redis_lpop over other list operations. No explicit usage context is given.

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