crabot (smilefufu/crabot) is an MCP server listed on the M8ven Trust Index. It scores 48 out of 100, grade D. It declares 19 tools. No publisher has claimed this listing.
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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smilefufu
Source: github_code
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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.
These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.
screenshotCapture a screenshot of the screen. Returns the image as base64 PNG.
mouse_clickMove the mouse to (x, y) and click. Supports left/right click and double click.
keyboard_typeType text using the keyboard. Simulates keystrokes for each character.
keyboard_keyPress a keyboard key with optional modifiers (command, shift, control, option).
git_statusGet the current git status including branch name and file changes.
git_diffShow git diff output. Supports staged changes and filtering by file path.
git_logShow git log with oneline format.
git_commitCreate a git commit. Optionally stage files first.
git_branchManage git branches: list, create, delete, or checkout.
git_stashManage git stash: push, pop, or list stashed changes.
get_diagnosticsGet diagnostics (errors/warnings) for a TypeScript file using tsc --noEmit. Returns structured diagnostic information.
get_hoverGet hover information (type info, documentation) for a symbol at a given position.
get_definitionFind the definition of a symbol at a given position.
find_referencesFind all references to a symbol at a given position.
document_symbolsList all symbols (functions, classes, variables, etc.) in a file.
workspace_symbolsSearch for symbols across the entire workspace by name pattern.
go_to_implementationFind implementations of an interface or abstract method.
incoming_callsFind all callers of a function/method at a given position.
outgoing_callsFind all functions/methods called by the function at a given position.
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
When Vitest UI server is listening, arbitrary file can be read and executed
Tool 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
19/19 tools missing one or more hints — screenshot (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); mouse_click (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); keyboard_type (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +16 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.
Destructive tools are labelled
1 tool perform destructive updates without destructiveHint — screenshot deletes at line 134 (unlinkSync(tmpPath))
Add destructiveHint:true to any tool whose handler calls .delete(), .upsert(), .update(), unlink, rm, DELETE, DROP, REPLACE INTO, or any operation that overwrites existing data.
Descriptions match behaviour
1 tool describes read intent but its handler mutates — get_diagnostics (line 215: execFile('npx', ['tsc', ...tscArgs], { cwd, timeout: 20_000 }, (err, stdout, stderr) => {)
Rename the tool, rewrite the description, or move the side-effect into a separate clearly-named tool.
README present
No README found
Add a README.md describing the server and its tools.
License file
No license file
Add a LICENSE file (MIT, Apache-2.0, etc.).
Tool test coverage
Only 0/19 tools referenced in tests (0%)
Write tests that reference each tool by name so every tool has at least one test.
Tests pass
npm test failed — tests do not pass
Make sure npm test runs cleanly. Common cause: missing build step or missing env vars.
Dev dependencies
1 critical/high in dev-only deps (does not ship to users)
Upgrade dev dependencies when convenient.
Tool description accuracy
get_diagnostics: 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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