canvases_get_canned_templates
A read tool on the Slack MCP server.
This record as markdown: /tools/karbassi-slack-mcp/canvases-get-canned-templates.md
What canvases_get_canned_templates does on Slack
AI agents call canvases_get_canned_templates to retrieve information from Slack without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why canvases_get_canned_templates is rated Low
This tool retrieves canned (pre-made) canvas templates from Slack, which is a data retrieval operation with no side effects. It does not modify, delete, or execute arbitrary operations. However, confidence is moderate (0.7) because the description is empty, leaving some ambiguity about the exact scope and whether template retrieval might have associated metadata or permissions implications.
From the tool's definition Tool name contains 'get' and 'canvases_get_canned_templates' indicates retrieval of canvas templates. The server description states the MCP provides access to 'canvases' among other Slack resources. The 'get' verb signals a read operation.
Attacks that exploit this kind of access
The rule that runs canvases_get_canned_templates safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Slack, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For canvases_get_canned_templates, this is the rule to start with:
canvases_get_canned_templates 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 Slack, apply this rule, and every canvases_get_canned_templates call is checked against it from then on.
Questions about canvases_get_canned_templates
canvases_get_canned_templates is a read tool on the Slack MCP server. It is categorised as a Read tool in the Slack MCP Server, which means it retrieves data without modifying state.
Register the Slack MCP server in PolicyLayer and add a rule for canvases_get_canned_templates: 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 Slack. Nothing to install.
canvases_get_canned_templates 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 canvases_get_canned_templates 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 canvases_get_canned_templates. 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.
canvases_get_canned_templates is provided by the Slack MCP server (karbassi/slack-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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