Local MCP server for the Spawn Games agent API, enabling LLMs to manage game projects, push updates, and interact with live games via a Playwright Chromium client.
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wfbcargo
Source: Glama
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Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse
Anthropic's MCP TypeScript SDK has a ReDoS vulnerability
Playwright downloads and installs browsers without verifying the authenticity of the SSL certificate
SPAWN_HTTP_TIMEOUT_MS60000 Abort API calls that hangSPAWN_PLAY_HEADED1 0 forces headless (see the warning below); games will not renderSPAWN_PROJECT_DIR"": "/absolute/path/to/your-spawn-game"SPAWN_TEAMunset 1 enables team mode: adds spawn_team_ and the session latchSPAWN_TEAM_DIRshared .git/spawn-team Ledger location, for agents that are not worktrees of one repoTool 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
33/33 tools missing one or more hints — spawn_play_open (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); spawn_play_screenshot (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); spawn_play_input (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +30 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 — spawn_init (line 189: mkdirSync(p, { recursive: true }))
Rename the tool, rewrite the description, or move the side-effect into a separate clearly-named tool.
Tool inputs are validated
23/33 tool handlers declare input schemas (70%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool test coverage
13/33 tools referenced in tests (39%)
Write tests that reference each tool by name so every tool has at least one test.
Production dependencies are patched
0 critical, 3 high severity in production deps — @modelcontextprotocol/sdk@1.25.0 (high), @modelcontextprotocol/sdk@1.25.0 (high)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
Tool description accuracy
spawn_init: 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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