tailscale_set_dns_configuration

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

Annotations already indicate the tool is not read-only and is idempotent. The description adds that it 'Replaces all DNS settings', which is useful behavioral context. However, it does not describe the return value or any side effects, which is a gap for a mutation tool without an output schema.

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?

Two sentences, no wasted words. First sentence states the core action and scope; second explains what is replaced. Information is front-loaded and efficiently presented.

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?

The description covers the core purpose and parameter types, but lacks information on return value and behavior when no parameters are provided (since all are optional). This leaves ambiguity about whether an empty call clears settings or does nothing.

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?

Input schema has 100% description coverage, so baseline is 3. The description adds value by listing the four parameter categories (nameservers, search paths, split DNS, MagicDNS) and explaining they are all replaced, which clarifies the relationship between parameters and the operation.

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 'Set' and the resource 'unified DNS configuration for your tailnet'. It distinguishes from sibling tools like tailscale_set_nameservers and tailscale_set_split_dns by emphasizing that this replaces all DNS settings in a single call, making it the bulk alternative to granular setters.

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 implies when to use this tool (for unified replacement) versus individual DNS tools, but does not explicitly name alternatives or exclusion criteria. The context of siblings provides enough differentiation, so it's clear but not fully explicit.

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