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

Annotations already establish the safety profile (readOnly, idempotent, non-destructive, openWorld). The description adds nothing about response shape or aggregation behavior, but with annotations covering safety and an output schema present, this is acceptable context.

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 efficient sentence that front-loads the verb and resource. No waste, though it could be tighter by naming the alternative tools rather than just listing scopes.

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 an output schema handling return values and annotations covering safety, the description is functionally adequate. However, for a tool with five optional parameters where scope drives which IDs are required, the description should clarify how scope selection works and how it relates to the granular sibling tools.

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 schema already documents all five parameters including enums, defaults, and required conditions. The description adds marginal value by naming the three usable scopes, but the schema does the heavy lifting. Baseline elevated slightly by the scoping hint.

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 clear verb ('Fetch') and resource ('total scans analytics') with scope modifiers (account, project, QR code). However, it does not distinguish this aggregate 'total' tool from siblings like get_account_scans, get_project_scans, and get_qrcode_scans, which appear to cover the same scopes at a more granular level.

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 the numerous sibling scan tools (get_account_scans, get_project_scans, get_qrcode_scans, get_scans_by_date, etc.). The description implies the scopes but leaves the agent to infer which tool to pick from a crowded family of scan-related siblings.

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