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

Annotations (readOnlyHint=false, destructiveHint=false) indicate a write operation, which is consistent with 'create'. However, the description adds no behavioral details beyond that, such as side effects, permissions required, or rate limits. Given no annotation enrichment, this is insufficient.

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 very short (one sentence), which is concise but at the expense of completeness. It front-loads 'Authenticated' but contains no structured information. It could be improved without adding length.

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 no output schema and many sibling tools, the description is critically incomplete. It does not explain what a 'source' is, what the tool returns, or how it differs from similar creation tools. The agent lacks essential context to use it correctly.

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?

Schema coverage is 0%, meaning the description must explain parameters, but it provides no parameter information. The three parameters (name, vendor, signingSecret) are not described at all, leaving the agent to infer meaning solely from the schema, which is minimal.

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?

Description states 'create source' clearly, a verb+resource. However, it does not distinguish from sibling tools like 'create_destination' or 'create_endpoint', which also create resources. The purpose is clear but lacks 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?

No guidance on when to use this tool versus alternatives. The description only mentions 'Authenticated', which is a prerequisite, not usage context. There is no mention of when creating a source is appropriate or what conditions must be met.

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