subscribe_webhook

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states the tool's function but fails to describe critical behavioral traits: it doesn't mention whether this is a mutating operation (likely yes, as it 'subscribes'), what permissions are required, if there are rate limits, how events are formatted, or if the subscription is persistent. For a tool that likely modifies system state, this is a significant gap in transparency.

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, efficient sentence that directly states the tool's purpose without any redundant or unnecessary information. It is appropriately sized and front-loaded, with every word contributing to understanding the core functionality.

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 complexity of a subscription tool with no annotations and no output schema, the description is incomplete. It doesn't explain what happens after subscription (e.g., event format, delivery guarantees), potential errors, or how to manage the subscription later. For a tool that likely involves ongoing system changes, more context is needed to ensure proper usage.

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 input schema has 100% description coverage, with the single parameter 'url' well-documented in the schema. The description adds no additional semantic context about the parameter beyond what's in the schema (e.g., URL format requirements or validation rules). According to the rules, when schema coverage is high (>80%), the baseline score is 3 even with no param info in the description, which applies here.

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 a webhook URL') and the resource ('to receive click events for all links in the workspace'), providing a specific verb+resource combination. However, it doesn't explicitly distinguish this tool from its sibling 'subscribe_link_webhook', which likely subscribes to events for specific links rather than all links, leaving some ambiguity about sibling differentiation.

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 provides no guidance on when to use this tool versus alternatives like 'subscribe_link_webhook' or other webhook-related tools. It lacks context about prerequisites, such as whether the URL needs to be pre-configured, or exclusions, such as when not to use it. This leaves the agent with minimal usage direction.

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