save_token
Save an authentication token with a name for later use. Supports multiple tokens for different accounts/services. Use list_tokens to see saved tokens and set_active_token to switch between them.
This record as markdown: /tools/1600822305-js-reverse-mcp/save-token.md
What save_token does on Js Reverse
AI agents use save_token to create or update resources in Js Reverse, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Js Reverse environment.
Why save_token is rated Medium
This tool creates and stores authentication tokens persistently. While not destructive (tokens can be replaced or deleted) or financial in itself, it modifies the browser's stored credentials state. The high severity reflects that saved tokens could be harvested by a malicious agent to impersonate users or access services.
From the tool's definition Tool description states it 'Save[s] an authentication token with a name for later use' and 'Supports multiple tokens for different accounts/services.' The verb 'save' combined with storing security-sensitive credentials indicates data creation/modification.
Attacks that exploit this kind of access
The rule that runs save_token safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Js Reverse, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For save_token, this is the rule to start with:
save_token stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Js Reverse, apply this rule, and every save_token call is checked against it from then on.
Questions about save_token
Save an authentication token with a name for later use. Supports multiple tokens for different accounts/services. Use list_tokens to see saved tokens and set_active_token to switch between them. It is categorised as a Write tool in the Js Reverse MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Js Reverse MCP server in PolicyLayer and add a rule for save_token: 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 Js Reverse. Nothing to install.
save_token is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the save_token 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 save_token. 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.
save_token is provided by the Js Reverse MCP server (1600822305/js-reverse-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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