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

Annotations already declare this a non-destructive write (readOnlyHint=false, destructiveHint=false, idempotentHint=false), so the agent knows it mutates state and creates a new entry. The description adds only that the result lands in a 'backlog,' without covering duplicate handling, auth needs, or what confirmation is 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 front-loaded sentence with no filler; the verb, the object, and the destination are established immediately.

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?

With annotations covering the write/safety profile and 100% schema coverage, the description is adequate but thin for a create operation: it does not state whether repeated saves duplicate entries or whether the saved idea can be retrieved via get_idea_bank. For a persistence tool, a bit more behavioral context would help.

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 all eight parameters, including the angleType enum, are already documented in the schema. The description's mention of 'angle card or brainstormed concept' loosely maps to those fields but adds no syntax, format, or constraint detail beyond the schema. 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?

States a specific verb ('Save') and destination resource ('the user's Idea Bank backlog'), and names what is being saved ('an angle card or brainstormed concept'). It is clearly distinct from retrieval siblings like get_idea_bank, though it does not explicitly differentiate itself from convert_sparring_idea_to_post.

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 phrase 'for later use' implicitly signals that this is for parking ideas rather than publishing, which is useful against siblings like convert_sparring_idea_to_post and publish_post. However, there is no explicit when-to-use framing, no prerequisites, and no named alternative.

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