redis_sismember

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

No annotations are provided, so the description carries full burden. It indicates a read operation ('check'), but does not disclose return value format or error behavior. The simplicity of the tool reduces the need for extensive disclosure, but some aspects are missing.

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 with no wasted words. It is front-loaded and direct, achieving maximum efficiency.

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?

The tool has 3 parameters and no output schema. The description is minimal and does not explain return values, error cases, or behavior when key does not exist. While the tool is simple, the description lacks sufficient context for an AI agent to fully anticipate its behavior.

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 33% (only connectionId described). The description does not add meaning for key and member parameters beyond the schema. For a tool with low schema coverage, the description fails to compensate by explaining parameter roles.

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 tool checks if a value is a member of a set, using specific verb 'check' and resource 'value is a member of a set'. It distinguishes from sibling Redis set operations like redis_sadd (add) and redis_smembers (get all members).

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?

No explicit guidance on when to use or alternatives is provided. The description implies usage for membership testing, but does not mention when to prefer this over other set operations or how it fits with other tools.

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