Screeny
Screeny is a privacy-focused macOS MCP server enabling AI agents to capture screenshots of user-approved windows
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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rohanrav
Source: mcp.so
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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.
list_windowsList all currently approved windows available for screenshot capture.
take_screenshotTake a screenshot of a specific window by its ID using direct capture.
SCREENY_MAX_B64_KBYour choice is saved in ~/.screeny/config.json as max_b64_kb. You can also override via the environment variable. The active cap is clamped to 100–900KB.All four hints declared on every tool
2/2 tools missing one or more hints — list_windows (missing: destructiveHint, idempotentHint); take_screenshot (missing: destructiveHint, idempotentHint). 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.
Tool annotations match behaviour
1 read-only tool performs write/delete/exec — take_screenshot (line 619: os.unlink(tmp_path))
Either remove the readOnlyHint:true annotation, or remove the write/delete call from the tool handler.
Destructive tools are labelled
1 tool perform destructive updates without destructiveHint — take_screenshot deletes at line 619 (os.unlink(tmp_path))
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.
Tool inputs are validated
1/2 tool handlers declare input schemas (50%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tests exist
No test files found
Add tests that exercise each declared tool.
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