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

The description provides rich behavioral detail, including memory movement on rename, automatic alias registration, and the rejection of aliases with live memories. However, it directly contradicts the annotations: destructiveHint=false while action=unalias explicitly deletes a registered alias and rename mutates domain state in place. This makes the safety signal unreliable and earns a score of 1 under the contradiction rule.

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 long but densely structured, with no filler. Each sentence adds a distinct behavior, precondition, or synonym, and the default/list behavior is front-loaded before the action-specific cases. This is efficient for a six-parameter multi-action 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?

For a complex multi-action tool with no output schema, the description covers the default return shape, the resolve return shape, preconditions, and the merge_domains alternative. The main gaps are that return values for alias, unalias, and rename are not specified, and no auth/permission context is given, but these are minor given the overall detail.

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 carries the full burden for all six parameters. It maps every parameter to a concrete action and condition: {alias,domain} for alias registration, {alias} for unalias, {name} for resolve, {old_domain,new_domain} for rename, and action values/synonyms are listed explicitly. This fully compensates for the empty 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 opens with a clear verb+resource pair, 'Domain administration and discovery,' and then details every action (list, alias, unalias, resolve, rename) with its specific effect and required parameters. The default behavior is explicitly defined, so an agent can distinguish this tool from the memory- and search-focused siblings.

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 states exactly when to omit action (default list), enumerates action choices and synonyms, and gives a concrete exclusion: if the new_domain already has memories, use merge_domains instead. It also tells the agent to move or archive live memories before registering an alias, making the routing guidance explicit.

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