update_watch_rules

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

Annotations already declare readOnlyHint=false and destructiveHint=true, so the destructive nature is known. The description adds useful operational context: user confirmation is required, and the confirm_action flag must be set true after approval on the local REST bridge. It does not disclose what happens to existing event types or whether the change is reversible, which is the key behavioral unknown for a destructive mutation.

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?

Three short sentences, front-loaded with the action and its scope, then the confirmation requirement. The final sentence largely restates the confirm_action schema description, which is the only mildly redundant element.

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?

No output schema exists and the description never indicates the return value, and it omits whether the tool errors on non-owned watchlists or how partial updates behave. Given four parameters, a destructive annotation, and thin schema coverage, more should be said, though the confirmation flow is adequately covered.

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 only 25%, and the one documented parameter (confirm_action) is described almost verbatim in the schema itself, so the description adds little. It conveys that watchlist_id must reference an owned watchlist and that event_types affect future matching only, but leaves the critical semantics of event_types (replace vs. merge) and paused unexplained.

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 specific verbs and resource: pause/resume an owned watchlist or change its future matched event types. An agent can tell this is the mutation counterpart to list_watchlists/get_watchlist, though siblings like create_watchlist or add_watch_target are not explicitly distinguished.

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?

Imposes a clear precondition (the watchlist must be owned) and a required confirmation step before acting, which implies when it is appropriate to call. It never names an alternative tool or states when not to use this one, so routing guidance is only implied.

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