MCP Datadog Server

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

No annotations are provided, so the description carries the full burden. It mentions an authentication requirement (registered application key), which is useful behavioral context. However, it doesn't disclose whether this is a read-only operation, what the return format looks like, error conditions, or rate limits—critical gaps for a tool with zero annotation coverage.

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 two sentences: one states the purpose, and the other adds authentication context. It's front-loaded with the core action and avoids unnecessary details. However, the second sentence includes a markdown link that might not be fully parsed by an agent, slightly reducing clarity.

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 (a 'get' operation with authentication requirements), no annotations, and no output schema, the description is incomplete. It lacks information on what 'an existing Action Connection' entails—whether it's by ID, name, or returns all connections—and doesn't describe the return value, making it inadequate for reliable agent use.

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 0 parameters with 100% coverage, so there are no parameters to document. The description doesn't need to add parameter semantics, and it appropriately doesn't mention any. A baseline of 4 is applied since no parameters exist, and the description doesn't incorrectly imply any.

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 verb ('Get') and resource ('an existing Action Connection'), making the purpose specific and understandable. However, it doesn't distinguish this tool from sibling tools like 'get_actions_app_key_registration' or 'get_actions_app_key_registrations', which also retrieve Action-related data but for different resources.

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 mentions an API requirement (registered application key) but provides no guidance on when to use this tool versus alternatives. There's no indication of whether this retrieves a single connection, all connections, or how it differs from other 'get' tools in the sibling list, leaving the agent without usage context.

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