hermes-computer-use
Pixel-level browser automation MCP server that drives a real Chrome browser using screenshots as vision input and OS-level mouse/keyboard as output, evading anti-bot detection.
Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
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Noah3521
Source: Glama
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Install from
The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
CU_DISPLAY_ENVCU_DISPLAY99 X display numberCU_WIDTH/ CU_HEIGHT 1440 / 900 Virtual screen sizeCU_HEIGHTCU_WIDTH / 1440 / 900 Virtual screen sizeCU_STATE_DIR/tmp/hermes-computer-use Logs, PID filesCU_INPUTxdotool Set to ydotool for /dev/uinput inputCU_KEY_DELAY_MS25 Inter-keystroke delayCU_MOVE_STEPS18 Cursor interpolation stepsCU_ENABLE_CDPOptional DOM fast-path (=1) dom_click, dom_type, dom_query, dom_exists, dom_wait, dom_eval, network_capture, console_messagesCU_CDP_PORTTool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
38/38 tools missing one or more hints — screen_info (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); screenshot (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); cursor_position (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +35 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Descriptions match behaviour
1 tool describes read intent but its handler mutates — clipboard_get (line 426: if subprocess.run(["which", prog[0]], capture_output=True).returncode == 0:)
Rename the tool, rewrite the description, or move the side-effect into a separate clearly-named tool.
Tool inputs are validated
24/38 tool handlers declare input schemas (63%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool handlers catch errors
Only 2/38 tool handlers wrap calls in try/catch (5%)
Wrap each tool handler body in try/catch and return a structured error response.
Tests exist
No test files found
Add tests that exercise each declared tool.
Tool description accuracy
clipboard_get: description implies read-only but handler writes/deletes/executes
Update tool descriptions to accurately reflect all capabilities — especially write, delete, or execute operations.
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