AI agents call spaces_suggest to retrieve information from Musubix without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs a query-based suggestion or search operation to recommend files. It does not create, modify, delete, execute code, or trigger external operations. It is a read-only information retrieval function that provides recommendations based on context. The 'suggest' nature and file-retrieval aspect are consistent with Read category operations.
From the tool's definition Tool name 'spaces_suggest' and description indicate it 'suggests files that should be added to context based on query' (translated from Japanese: クエリに基づいてコンテキストに追加すべきファイルを提案します). This is a retrieval/suggestion operation with no side effects.
Attacks that exploit this kind of access
クエリに基づいてコンテキストに追加すべきファイルを提案します。. It is categorised as a Read tool in the Musubix MCP Server, which means it retrieves data without modifying state.
Register the Musubix MCP server in PolicyLayer and add a rule for spaces_suggest: 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 Musubix. Nothing to install.
spaces_suggest 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 spaces_suggest 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 spaces_suggest. 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.
spaces_suggest is provided by the Musubix MCP server (@nahisaho/musubix-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
spaces_suggest is one line of Musubix's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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