add_static_dns

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

With no annotations present, the description carries the full burden and does so well: it declares this is a WRITE tool gated behind MIKROTIK_ALLOW_WRITE=true, explains that confirm=False returns a before/after preview while confirm=True applies, and discloses the duplicate-detection error behavior. This is exactly the mutability, safety-gate, and side-effect context an agent needs.

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?

Front-loaded with the core action and command, then layered with type semantics, safety gating, and error behavior. Every sentence earns its place, though the multi-paragraph form is slightly longer than strictly necessary for a 7-param tool.

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?

Since an output schema exists, return values need not be described, and the description covers mutation semantics, safety gating, and idempotency thoroughly. The only shortfall is the unaddressed ttl/comment/device_name parameters, which matters for a tool with 0% schema coverage.

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%, so the description must compensate, and it does add real meaning for name, address, record_type, and confirm (including how CNAME writes to the `cname` field). However, ttl, comment, and device_name are never mentioned, leaving nearly half the parameters undocumented anywhere.

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?

States a specific verb+resource and even names the underlying RouterOS command (`/ip/dns/static add`), then clarifies the two record types and their distinct address semantics. An agent can distinguish it from the sibling `remove_static_dns` and from generic DNS reads like `dns_cache` without opening any schema.

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?

Gives concrete when-to-use scenarios (block a malicious domain via 0.0.0.0, internal DNS override) and spells out the two-step confirm workflow. It does not explicitly name an alternative tool or say when NOT to use it (e.g., use `add_static_dhcp_lease` instead for leases), so it stops short of a 5.

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