ddns_set

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

With no annotations provided, the description carries the full burden of behavioral disclosure and fails completely. It doesn't state whether this is a partial or full update, what happens to unspecified fields (all parameters have default null), whether changes require authentication, or whether the operation is reversible. For a mutation tool with zero annotation coverage, this is a serious gap.

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 single sentence is concise and front-loaded, but it's too minimal to be useful. It's efficient in size but lacks any structural elements that would help an agent understand the tool's behavior or 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 this is a 5-parameter mutation tool with no annotations and no output schema, the description is completely inadequate. It should at minimum describe the parameters, the update behavior, and any prerequisites or side effects, but it provides none of that.

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 schema has 5 parameters with 0% description coverage, so the description must fully compensate, and it does not. It provides no explanation of what active, service, hostname, username, or password mean in the context of DDNS configuration, nor how they should be formatted or used together.

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 states a verb (Modifie) and a resource (configuration DNS dynamique), which is clearer than a tautology but still vague compared to siblings like dhcp_set, firewall_set, or ddns_status. It doesn't differentiate from similar configuration-setting tools, and doesn't specify what aspect of the DDNS config is being modified beyond the resource name.

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 like ddns_status. It doesn't mention prerequisites, whether the DDNS service must be enabled first, or what context triggers a need to modify DDNS settings. The description provides no usage context at all.

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