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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint: false and openWorldHint: false, so the safety profile is fully covered elsewhere. The description adds no behavioral context of its own, such as what happens on an unknown id (error vs. empty), visibility/tenant scoping, or whether soft-deleted interactions are returned.

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 short sentence, front-loaded with the verb and resource. Nothing is wasted, though there is little structure beyond the one clause.

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 one-parameter read tool with full annotation coverage and no output schema, the description is minimally sufficient to call it correctly. It omits any description of the returned shape or error behavior, which the absence of an output schema would otherwise invite.

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% and there is a single required parameter already documented. The description's "by id" adds no format hints (e.g., UUID vs. opaque string) beyond what the schema states, so baseline 3 applies.

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?

"Read one interaction by id" states a specific verb (read) and resource (interaction) with a scope qualifier (one, by id). This implicitly distinguishes it from interaction_list and interaction_create/upsert, though it never names those 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?

There is no explicit when-to-use or when-not-to-use guidance. The phrase "by id" weakly implies the caller must already hold an identifier, but an agent is left to infer that interaction_list is the alternative for discovery.

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