Create domain pointer

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

Annotations already declare readOnlyHint=false, openWorldHint=true, idempotentHint=false, and destructiveHint=false, so the safety profile is largely covered. The description adds the alias-vs-redirect consequence of the flag, but that information is duplicated verbatim in the schema, and it says nothing about auth requirements, re-run behavior on an existing pointer, or domain-verification prerequisites.

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?

A single sentence that front-loads the action and the target/pointer relationship, with zero filler. Nothing is padded or repeated unnecessarily.

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 3-parameter, non-nested create tool with full schema coverage and no output schema, the description covers purpose, directionality, and the alias/redirect branch. Remaining gaps — error conditions and prerequisites — are modest given the low complexity and the annotations that already signal this is a non-destructive, non-idempotent, open-world write.

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 description coverage is 100% — every parameter already carries a description including the alias default and the pointer example. The description restates the alias semantics and the domain/pointer direction without adding syntax, format, or constraint detail 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 gives a specific verb and resource ('Creates a domain pointer') and resolves the ambiguity that matters most here: which domain is the target and which one points at it. It does not name the sibling tools it must be distinguished from (delete_domain_pointer, list_domain_pointers), but the directionality statement makes the operation self-evident.

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?

Usage is only implied — an agent can infer this is the tool for establishing a pointer, and the alias=true/false clause hints at a choice to make. There is no explicit when-to-use or when-not-to-use guidance, nor any pointer to list_domain_pointers as the inspection alternative.

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