MCP Google Multi-Account Server
Enables natural language interaction with multiple Google accounts (Gmail, Drive, Calendar) from MCP-compatible clients like Claude.
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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bkbaheti
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.
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
@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse
GOOGLE_CLIENT_IDEnvironment variables: Set and GOOGLE_CLIENT_SECRETGOOGLE_CLIENT_SECRETEnvironment variables: Set GOOGLE_CLIENT_ID andMCP_GOOGLE_CONFIG_PATHOverride default config file locationMCP_GOOGLE_LOG_EMAIL_CONTENTMCP_GOOGLE_LOG_LEVELLog level: debug, info, warn, errorMCP_GOOGLE_LOG_RECIPIENTSMCP_GOOGLE_PASSPHRASEclaude mcp add -s user proGoogleMCP -e =optional-passphrase -- npx -y @procedure-tech/mcp-googleTool 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
63/63 tools missing one or more hints — calendar_list_calendars (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); calendar_list_events (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); calendar_get_event (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +60 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 — gmail_get_attachment (line 1040: mkdirSync(outputDir, { recursive: true }))
Rename the tool, rewrite the description, or move the side-effect into a separate clearly-named tool.
Tool inputs are validated
61/63 tool handlers declare input schemas (97%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool handlers catch errors
56/63 tool handlers wrap calls in try/catch (89%)
Wrap each tool handler body in try/catch and return a structured error response.
License file
No license file
Add a LICENSE file (MIT, Apache-2.0, etc.).
Tool test coverage
Only 6/63 tools referenced in tests (10%)
Write tests that reference each tool by name so every tool has at least one test.
Production dependencies are patched
0 critical, 1 high severity in production deps — @modelcontextprotocol/sdk@1.25.3 (high)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
Dev dependencies
1 critical/high in dev-only deps (does not ship to users)
Upgrade dev dependencies when convenient.
Domain consistency
npm scope @procedure-tech doesn't match GitHub owner bkbaheti
Use the same org name across GitHub, npm, and your homepage so users can verify the publisher.
Tool description accuracy
gmail_get_attachment: 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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