comfy_subscribe

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

Annotations indicate readOnlyHint=false, and the description aligns with a state-changing operation. It discloses that a JSON confirmation is returned, but does not clarify subscription persistence, duplicate handling, or session scope. With annotations present, the description adds some context but lacks comprehensive behavioral detail.

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?

Description is concise and well-structured: a one-sentence summary, a parameter definition, and a return statement. Every line contributes value without redundancy or fluff.

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 is simple (one parameter) and an output schema exists, so return values are covered. However, the description lacks usage guidelines and any mention of subscription lifecycle (e.g., relationship to comfy_unsubscribe, whether subscriptions persist across sessions), making it incomplete for an agent navigating many related event tools.

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 schema provides no description for event_type (0% coverage). The description adds examples ('progress', 'error', 'complete') but does not enumerate all valid values or reference where to find them. This gives partial meaning beyond the bare schema, but is not a complete 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 ('Register interest in an event type') with examples of event types. It distinguishes from sibling comfy_unsubscribe by implying the inverse operation, but does not explicitly contrast with comfy_watch_progress or comfy_get_events, so it's not fully differentiated.

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 on when to use this tool versus alternatives like comfy_watch_progress or comfy_get_events. It does not indicate prerequisites, typical scenarios, or when not to use it, leaving the agent to infer from the name alone.

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