MCP Action Firewall

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. While it mentions the binary on/off nature, it fails to disclose side effects, what 'subscription updates' actually entail, whether this persists across sessions, or any permission requirements.

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?

Single sentence of seven words is efficiently structured and front-loaded. However, given the lack of annotations and behavioral ambiguity, the extreme brevity leaves critical gaps rather than demonstrating purposeful restraint.

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 state-mutation tool with zero parameters and no output schema, the description inadequately explains the simulation context, what resources are being subscribed to, or what behavior changes when toggled. Requires elaboration on the simulated environment.

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?

Zero parameters present, which per the guidelines establishes a baseline of 4. The description implies no arguments are needed for the toggle operation, which aligns with the empty schema.

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 uses a specific verb ('Toggles') and identifies the resource ('simulated resource subscription updates'). It distinguishes from sibling 'toggle-simulated-logging' by specifying the target domain (subscriber updates vs logging), though 'simulated resource subscription updates' remains somewhat jargon-heavy without additional context.

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?

Provides no guidance on when to use this tool versus its sibling 'toggle-simulated-logging' or other simulation tools. Does not indicate prerequisites (e.g., whether subscriptions must exist first) or when toggling is appropriate.

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