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

Annotations already cover safety (non-readOnly, openWorld, idempotent, non-destructive), and the description adds useful behavioral context: plan quotas, digest contents limited to NEW 1-2★ reviews and NEW/RISING pain points, and supported alert destinations. It does not clarify what 'test' does or whether removing an app also removes the webhook.

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-loads the core purpose and is compact, though the parenthetical plan limits and the final action list make it slightly dense. Every sentence contributes useful information; there is no filler.

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?

Given a multi-action tool with no output schema, the description covers purpose, plan limits, digest behavior, and alert destinations well. Minor gaps remain around what 'list' returns and what 'test' performs, but an agent can call the tool correctly for most actions.

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 schema already documents appId, store inference, and webhookUrl with 75% description coverage. The description adds the action enum and ties webhookUrl to Slack/Discord/webhook destinations, but does not explain what each action does (e.g., 'test') or how parameters map to actions beyond 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?

States a specific verb and resource ('continuous competitor monitoring', 'manage the watchlist and the alert destination') and clearly separates itself from the sibling retrieval/analytics tools by emphasizing ongoing alerts rather than on-demand data.

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?

Provides clear context for when this tool is appropriate (ongoing monitoring with pushed digests) and includes plan tiers that constrain usage, but does not explicitly say when not to use it or name alternate siblings for one-off lookups.

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