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

With no annotations provided, the description carries the full behavioral burden. It does disclose the critical trait — that app data is deleted, not just the binary removed — which is the most important warning for a destructive operation. However, it says nothing about irreversibility, whether deletion can be scoped or skipped, required permissions, or what happens on failure.

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 front-loaded sentence with zero filler: the action and its destructive consequence come first. It is terse rather than padded, though that terseness is the same under-specification penalized elsewhere.

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 destructive, two-required-parameter operation with no annotations and no output schema, the description is thin. It omits preconditions, irreversibility, the undocumented 'package' format, and any sense of what the call returns or how failures surface.

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 50%: phone_id is documented as the 'ph_…' identifier, but 'package' has no description at all and the tool description never clarifies its expected format (e.g., reverse-domain package name) or whether it must match an installed app. The description adds no parameter meaning 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?

The description pairs a specific verb ('Uninstall') with a specific resource ('an app') and adds the side effect of deleting its data. The verb alone distinguishes it from the sibling install_app and list_apps, though it never names those siblings explicitly.

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?

There is no guidance on when to use this versus install_app or list_apps, no prerequisites (must the app be installed, must the phone be running or parked), and no indication that data deletion is unconditional. The agent must infer all usage context.

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