TouchBridge
TouchBridge is a local-first MCP server for iOS simulators and physical devices, enabling AI to see, control, test, and redesign iPhone screens through a structured screenshot bridge and tool surface.
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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MarshallBear1
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.
SHELLTOUCHBRIDGE_GESTURE_BENCH_ITERATIONSTOUCHBRIDGE_GESTURE_BENCH_TIMEOUT_MSTOUCHBRIDGE_GESTURE_BENCH_UDIDTOUCHBRIDGE_GESTURE_BENCH_XTOUCHBRIDGE_GESTURE_BENCH_YTOUCHBRIDGE_GESTURE_EVENTS_SOCKETTool 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
12/12 tools missing one or more hints — describe_screen (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); device_action (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); device_actions (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +9 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 — capture_design_snapshot deletes at line 634 (fs.rm(directory, { recursive: true, force: true }))
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 — list_devices (line 746: execFile('xcrun', ['simctl', 'list', 'devices', 'booted', '-j'], { timeout: 10000 }, (error, stdout)…)
Rename the tool, rewrite the description, or move the side-effect into a separate clearly-named tool.
Tool inputs are validated
9/12 tool handlers declare input schemas (75%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tests exist
No test files found
Add tests that exercise each declared tool.
Shell command execution
3 child_process calls — runs shell commands
Prefer library functions over shell-outs. If you must shell out, ensure all inputs are properly escaped.
Tool description accuracy
list_devices: 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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