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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, and the description reinforces this with 'opens nothing by itself' plus the required handoff to browser tools. It also adds genuinely useful external context (no public DistroKid API or official MCP server), though it says nothing about what the returned steps look like in structure or length.

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?

Front-loaded: the core purpose and the 'returns steps, opens nothing' constraint come in the first sentence, with the browser-tool handoff immediately after. The trailing API-availability note (with a verification date) is mild padding but does earn some trust context.

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 no output schema, the description appropriately explains what comes back (screens, buttons, fields) and what the agent must do next. For a zero-parameter, read-only tool this is close to complete; only the format/shape of the returned steps is left unspecified.

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?

Zero parameters, so the baseline is 4; the description correctly implies no inputs are needed and doesn't invent any. Nothing further is required here.

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?

Names a specific verb and resource (daily stats in the user's DistroKid account) and, unlike most siblings, immediately clarifies that what it actually returns is step-by-step guidance rather than the stats themselves. It distinguishes itself from distrokid_get_earnings_by_store and distrokid_get_hyperfollow_stats by scoping to daily stats, though the name/return-value mismatch takes a sentence to resolve.

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?

Gives an explicit workflow: call this first to get the steps, then execute them with the cotlet_browser_* tools in the Cloud Browser, and states that it opens nothing by itself. What's missing is an explicit alternative — it never says when to prefer distrokid_get_earnings_by_store or get_hyperfollow_stats over this one.

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