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

Annotations already cover the safety profile (readOnlyHint=false, destructiveHint=false, openWorldHint=false), so the bar is lower. The description earns credit by adding behavior beyond annotations: the topic is created empty (no prompts attached) and names are unique per domain case-insensitively, which lets an agent predict duplicate-name failures. It stops short of stating the actual error or conflict response.

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?

Two short sentences, zero filler, with the action and scope front-loaded and the uniqueness constraint following. Nothing could be removed without losing 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?

For a simple two-parameter create tool with full annotation coverage this is close, but there is no output schema and the description never says what comes back — notably whether the new topic's ID is returned, which an agent would need to chain into create-prompt or move-prompt-to-topic.

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 100%, so baseline is 3; the description adds real semantics on top by specifying that 'name' is unique within a domain and compared case-insensitively, and that 'domain_id' scopes the topic to exactly one domain. That is more than the schema's bare 'Topic name' / 'Domain ID' labels.

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 and resource ('Create an empty prompt topic') scoped to 'one domain,' which distinguishes it from create-prompt (which presumably attaches a prompt). It does not explicitly differentiate from update-prompt-topic or list-prompt-topics, but the create semantics are unambiguous.

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: the 'empty' qualifier and the per-domain uniqueness rule hint at when this is the right call (bootstrapping a grouping before adding prompts), but no alternative is named and no prerequisite or when-not condition is stated. An agent must infer the workflow from siblings.

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