ByteBot MCP Server

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

No annotations are provided, so the description carries the full burden. It discloses the return format (base64 PNG) but lacks critical behavioral details: it doesn't specify if this requires user permissions, potential performance impacts (e.g., screen locking), error conditions (e.g., no display available), or side effects (e.g., interrupting other processes). The description is minimal beyond the basic action.

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 a single, efficient sentence that front-loads the core action ('Capture a screenshot of the entire screen') and follows with essential output details. There is no wasted text, and every word contributes to understanding the tool's function.

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 low complexity (0 parameters, no annotations, no output schema), the description is adequate but incomplete. It covers the basic purpose and output format, which is sufficient for a simple operation, but lacks behavioral context (e.g., permissions, errors) that would be helpful for an AI agent to use it safely and effectively.

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 tool has 0 parameters, and schema description coverage is 100% (empty schema). The description doesn't need to explain parameters, and it adds value by specifying the output format ('base64-encoded PNG image data'), which isn't covered by the schema. This compensates for the lack of an output 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 clearly states the specific action ('Capture a screenshot') and resource ('entire screen'), distinguishing it from siblings like bytebot_read_file or bytebot_write_file that handle files. It also specifies the output format ('base64-encoded PNG image data'), making the purpose unambiguous and distinct.

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 provides no guidance on when to use this tool versus alternatives. It doesn't mention prerequisites (e.g., screen access permissions), exclusions (e.g., not for partial screens), or related tools (e.g., bytebot_cursor_position for mouse-related actions). Usage is implied only by the action itself.

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