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 discloses the authentication requirement (registered application key), which is useful behavioral context. However, it doesn't mention whether this is a mutating operation (implied by 'Create'), potential side effects, rate limits, or what the response might contain. The description adds some value but leaves significant behavioral gaps.

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 with zero waste: the first states the purpose, the second provides a critical prerequisite. Every sentence earns its place, and it's appropriately sized for a tool with no parameters.

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 tool has no parameters and no output schema, the description is minimally adequate. It explains what the tool does and a key requirement, but for a creation tool with no annotations, it should ideally mention what an 'Action Connection' is, what it's used for, or what happens after creation. The context is incomplete for full understanding.

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% description coverage, meaning there are no parameters to document. The description doesn't need to add parameter semantics, so it appropriately focuses on other aspects. A baseline of 4 is appropriate since there are no parameters to compensate for.

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 'Create' and the resource 'Action Connection', making the purpose specific and understandable. However, it doesn't differentiate from sibling tools like 'create_api_keys' or 'create_application_keys', which also create different resources in the same system.

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 a prerequisite about requiring a registered application key, which gives some usage context. However, it doesn't explain when to use this tool versus alternatives (e.g., when to create an Action Connection vs. other connection types or vs. updating/deleting connections), nor does it mention any exclusions or specific scenarios for its use.

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