This record as markdown: /tools/io-github-kivanccakmak-yaver/go-mod-why.md
What go_mod_why does on Yaver
AI agents call go_mod_why to retrieve information from Yaver without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
module | string | Yes | |
directory | string | — |
Parameters from the server's own tool schema.
Why go_mod_why is rated Low
The tool performs dependency analysis and explanation, which is a read-only operation. It retrieves and presents information about Go modules but does not create, modify, delete, or execute any code. No side effects or state changes occur. The blast radius of misuse is minimal — an attacker could only extract or understand module dependency information.
From the tool's definition 'Explain why a Go module is needed' — this is a query/information retrieval function that analyzes and returns explanatory information about Go module dependencies without modifying or executing code.
Risk signalsAccepts file system path (directory)
Attacks that exploit this kind of access
The rule that runs go_mod_why safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Yaver, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For go_mod_why, this is the rule to start with:
go_mod_why 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 Yaver, apply this rule, and every go_mod_why call is checked against it from then on.
Questions about go_mod_why
Explain why a Go module is needed. It is categorised as a Read tool in the Yaver MCP Server, which means it retrieves data without modifying state.
go_mod_why accepts 2 parameters: module, directory. Required: module. The full parameter table on this page comes from the server's own tool schema.
Register the Yaver MCP server in PolicyLayer and add a rule for go_mod_why: 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 Yaver. Nothing to install.
go_mod_why 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 go_mod_why 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 go_mod_why. 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.
go_mod_why is provided by the Yaver MCP server (yaver-cli). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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