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

Annotations already declare this as read-only, idempotent, non-destructive, and closed-world, so the safety profile is fully covered. The description adds useful scoping context by saying the assistant must belong to this workspace, implying cross-workspace IDs are not valid, but says nothing about not-found behavior or response shape.

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 definition is a single front-loaded sentence with zero filler. For a simple single-resource read tool, this is appropriately sized and every word carries meaning.

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 tool is simple, has rich annotations and full schema coverage, so the description is close to sufficient. It nonetheless omits sibling routing versus list_assistants and any hint about missing-resource behavior, leaving clear but minor gaps.

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%, so the single id parameter is already fully documented by the schema. The description adds only workspace scoping and no extra detail about the identifier format or source, matching the baseline for schema-complete parameters.

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 states a specific verb (Get), resource (assistant), cardinality (one), and workspace scope, so the core operation is clear. It does not distinguish itself from the sibling list_assistants or explain when single retrieval is preferable, which keeps it below a 5.

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?

"Get one assistant" implies the single-item lookup use case versus the list tool, but there is no explicit when-to-use guidance, no alternatives named, and no prerequisite that the id must come from a previous request. Usage is implied rather than stated.

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