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

Annotations already declare readOnlyHint=true and destructiveHint=false, making the safe read nature clear. The description adds minimal behavioral context (retrieving a configured value), which is adequate but not rich. No contradictions with annotations.

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 a single sentence that directly states the tool's purpose. It is concise and front-loaded with no unnecessary words, perfectly matching the tool's simplicity.

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 trivial getter with no parameters and annotations covering safety, the description provides the essential information. However, it could be slightly more complete by hinting at the return type (e.g., a number) or scope (e.g., per campaign or overall). Still, it is functionally complete.

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?

The tool has no parameters, so schema description coverage is trivially 100%. The description does not need to add parameter info, and the baseline score of 4 applies as it neither adds nor detracts from the 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 clearly states it retrieves the minimum spend for Magic Ads campaigns, with a specific verb and resource. It distinguishes from sibling get_magic_ tools by focusing on 'minimum spend' rather than campaigns or ads, though the exact meaning of 'minimum spend' could be clearer.

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?

No guidance on when to use this tool versus other get_magic_ tools or alternatives. The description does not mention context, prerequisites, or scenarios where this tool is appropriate.

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