serial_enter_uboot

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

No annotations are provided, so the description bears full responsibility. It discloses that the tool reboots the device and waits for prompts, which is helpful. However, it does not mention potential side effects (e.g., disruption from rebooting), required permissions, or what happens after success (e.g., the session becomes a U-Boot session). More detail on the tool's behavior would improve transparency.

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?

The description is concise—two sentences that immediately convey the core action and detection logic. It is front-loaded with the main purpose. Every word adds value, with no redundancy or 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 the tool's simplicity (2 parameters, no output schema, no nested objects), the description is fairly complete. It explains the reboot action and the prompts it detects. However, it could mention that the device must already be connected via serial (implied by session_id) and that the tool may hang if prompts are not detected within timeout. Still, it covers the essential context adequately.

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%, so the schema already describes both parameters (session_id and timeout). The description adds minimal extra semantics: it mentions 'Total timeout in seconds to wait for autoboot prompt (default: 60)' which is already in the schema description for timeout. It does not add new meaning beyond what the schema provides.

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 clearly states the tool's purpose: 'Enter U-Boot by rebooting the device and stopping autoboot.' It specifies the verb (enter), resource (U-Boot), and method (rebooting and stopping autoboot). It also mentions detecting specific prompts, which helps differentiate from sibling tools like serial_read or serial_write that do not initiate a reboot.

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?

The description implies the tool is used to enter U-Boot mode but does not explicitly state when to use it versus alternatives. Sibling tools like serial_shell_login might be alternatives for shell access after U-Boot, but no guidance is provided. The description lacks explicit 'when-to-use' or 'when-not-to-use' instructions.

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