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

The description discloses a key side effect: the build is added to the user's app library, which changes the workflow for future installs. It also implies a multi-step action (download + install). However, with no annotations present, it does not mention authentication requirements, failure modes, or behavior when the build already exists on the device.

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 sentences deliver the core action, side effect, and parameter sourcing without redundancy. The most important scoping information is front-loaded, and every sentence earns its place.

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 4-parameter tool with no output schema, the description covers the main function, side effects, and how to source parameters. It lacks explicit error/return behavior and device connection prerequisites, but these are often implicit for installation tools. Overall, it gives an agent enough to select and invoke the tool correctly.

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 coverage is 100% and each parameter already has a one-line description. The tool description adds extra guidance for releaseId, explaining how to obtain it from firebase_list_releases and that the latest build is the first entry. It also clarifies that after this call, further installs only need app_install, which helps the agent understand parameter usage going forward.

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 states a specific action: download a build from Firebase and install it on a connected device in one step. It distinguishes itself from app_install by noting the build is added to the user's app library, and references firebase_list_releases for selecting a releaseId.

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?

It explicitly explains when to use this tool (first install of a Firebase build) and when to use app_install instead (subsequent devices). It also directs the agent to firebase_list_releases to pick a releaseId, and clarifies that the latest build is the first entry, giving actionable selection criteria.

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