subscribe

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

With no annotations, the description carries full burden for behavioral disclosure. It mentions the subscription handle and return format but omits context on whether the command blocks, how messages are consumed, resource cleanup, or connection state changes, which are critical for a Redis subscription tool.

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 concise and well-structured with a one-line summary, Args, and Returns sections. Every sentence adds meaningful information without redundancy.

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 single-parameter tool with an output schema, the description covers the essential purpose, parameter semantics, and return format. However, it lacks guidance on usage context relative to sibling tools and does not elaborate on the lifecycle of the subscription handle, which is relevant in the Redis pub/sub context.

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 provides a plain-language definition for the 'channel' parameter ('The Redis channel to subscribe to'), compensating for the complete lack of schema descriptions (0% coverage). This adds meaning beyond the schema's type-only definition.

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 ('Subscribe to a Redis channel') and the output ('reusable subscription handle'), distinguishing it from broader pub/sub operations. However, it does not explicitly contrast with the sibling 'psubscribe' tool, which is likely for pattern subscriptions.

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 guidance is provided on when to use this tool over alternatives, such as 'psubscribe' or 'publish', nor are any exclusions or prerequisites mentioned. The description only states what the tool does.

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