watchers.package-release
WATCHER: get a signed callback when a package publishes a new version — track your dependencies. Arm once, pay once. registry is \
This record as markdown: /tools/io-github-2s-io-mcp/watchers.package-release.md
What watchers.package-release does on Mcp
AI agents call watchers.package-release to retrieve information from Mcp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why watchers.package-release is rated Low
This tool retrieves and monitors publicly available package release data. It sets up a watcher to notify the user of new versions—a read operation with no side effects. While it involves a payment (via the x402 protocol), the tool itself does not move money or create financial obligations beyond the stated pay-per-call model; it simply reads/watches for events. The most severe applicable category is Read.
From the tool's definition Tool description states it 'get[s] a signed callback when a package publishes a new version' and 'track[s] your dependencies.' This is passive monitoring and retrieval of package release information.
Attacks that exploit this kind of access
The rule that runs watchers.package-release safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For watchers.package-release, this is the rule to start with:
watchers.package-release is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Mcp, apply this rule, and every watchers.package-release call is checked against it from then on.
Questions about watchers.package-release
WATCHER: get a signed callback when a package publishes a new version — track your dependencies. Arm once, pay once. registry is \. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.
Register the MCP server in PolicyLayer and add a rule for watchers.package-release: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Mcp. Nothing to install.
watchers.package-release is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the watchers.package-release rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for watchers.package-release. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
watchers.package-release is provided by the MCP server (@2sio/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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