redis_sadd

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

No annotations are provided, so the description bears full responsibility. It discloses one behavioral trait ('Blocked when that connection's own readOnly mode is enabled'), which is useful. However, it omits other important behaviors such as idempotency, set creation on missing key, and return value semantics.

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 exceptionally concise with two short sentences. It front-loads the primary action and includes a key behavioral note with no wasted words.

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 tool's simplicity and lack of output schema or annotations, the description is adequate but could be more complete. It does not explain return values (e.g., integer indicating addition), set creation behavior, or error conditions, leaving gaps for an agent unfamiliar with Redis SADD.

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 does not add any meaning beyond the input schema for parameters 'key' and 'member'. Schema description coverage is low (33%), and while 'connectionId' has a schema description, the tool's description does not compensate for the other undocumented parameters.

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 ('Add a member to a set') and the specific resource ('a set'). It distinguishes itself from sibling Redis set tools like redis_srem and redis_smembers, and the blocking condition adds specificity.

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 implies usage for adding set members but does not provide explicit guidance on when to use this tool versus alternatives like redis_sadd or other set operations. It mentions a blocking condition but no exclusions or alternative tools.

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