rpop

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

The description discloses the destructive nature (remove and return), but it lacks details on behavior when the list is empty (returns nil) or type mismatch. No annotations are provided, so the description carries the burden but is not comprehensive.

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 sentence with no redundancy. It is concise, but given the simplicity of the tool, it could be slightly more informative without losing conciseness.

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?

For a simple one-parameter tool with an output schema, the description is adequate but lacks edge case details (e.g., empty list behavior). It does not reference the output schema or mention potential errors.

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 coverage is 0%, so the description must clarify the parameter. It says 'from a Redis list', implying 'name' is the key, but does not explicitly state that. For a single parameter, direct mapping between 'name' and the list key would improve clarity.

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') and the resource ('last element from a Redis list'). It effectively distinguishes from sibling tools like lpop (remove first) and lrange (get range).

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?

Usage context is implied (use when needing the last element), but no explicit guidance on when not to use or alternatives are provided. For example, it does not mention that lpop might be preferred for first-element removal.

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