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exileum

meta-mcp

meta_get_webhook_subscriptions

List webhook subscriptions to view real-time event monitoring configured for Instagram and Threads accounts

Instructions

List current webhook subscriptions for the Meta App.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior3/5

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

With no annotations provided, the description carries the full burden. 'List' implies a read-only operation, but the description lacks details on return format, pagination, what 'current' means (active vs all), or required permissions.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Single sentence, front-loaded with the verb, and appropriately sized for a zero-parameter tool. No wasted words.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the absence of an output schema and annotations, the description should ideally describe the return structure (e.g., subscription IDs, callback URLs). It provides the minimum viable context for a simple list operation but leaves significant gaps regarding the response format.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema has zero parameters, which per guidelines sets a baseline of 4. The description does not need to compensate for missing parameter documentation.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description provides a clear verb ('List') and resource ('webhook subscriptions') and scopes it to the 'Meta App', distinguishing it from Instagram/Threads siblings. However, it does not explicitly differentiate from the sibling 'meta_subscribe_webhook' (create vs list).

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance provided on when to use this tool versus alternatives like 'meta_subscribe_webhook'. Missing prerequisites (e.g., app ID context) or conditions for use.

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

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