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

The description warns that credentials will be visible in the AI conversation context, which is crucial behavioral disclosure. It also notes the Proof account requirement and authentication steps. However, it doesn't describe side effects like whether this replaces an existing DNS connection or what happens on success.

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 compact and front-loads the purpose, followed by the security warning and the access workflow. Every sentence adds necessary information, though the access section could be slightly shorter.

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 tool with three required params and no output schema, the description covers the authentication prerequisite and credential exposure, but doesn't state expected outcome or side effects. It's adequate for a simple connect action but leaves some operational details to the agent's inference.

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 100% and each parameter has an adequate description ('Domain ID', 'DNS provider identifier', 'Provider-specific credential key-value pairs'). The description only echoes the generic 'provider-specific credentials' phrase, adding no extra meaning beyond the 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 ('Connect') and the resource ('DNS provider') plus the target ('domain'), and differentiates itself from siblings like connect_cloudflare and connect_godaddy by saying 'generic DNS provider'. An agent can immediately tell this is the fallback for providers without a dedicated tool.

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?

It gives clear context: the tool is for generic providers, and it explains the authentication flow (needs a Proof account, authenticate or sign in with start_login, then call again). It doesn't explicitly name alternatives or exclusions, but 'generic' implies it's the fallback for non-Cloudflare/GoDaddy providers.

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