fenwick_tree
Build a Fenwick tree (Binary Indexed Tree) from values and run point updates and range sum queries.
This record as markdown: /tools/io-github-malamutemayhem-unclick-mcp-server/fenwick-tree.md
What fenwick_tree does on UnClick
AI agents invoke fenwick_tree to trigger actions in UnClick. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
| Parameter | Type | Required | Description |
|---|---|---|---|
values | array | Yes | Initial array of numbers |
operations | array | — | Operations: {type:'update',index,delta}, {type:'query',left,right}, {type:'point_query',index} |
Parameters from the server's own tool schema.
Why fenwick_tree is rated High
This tool executes computational logic (building trees, updating nodes, running queries) based on user input, placing it in the Execute category rather than Read—while it doesn't modify external systems or have side effects, it actively runs algorithms that transform data.
From the tool's definition The tool performs 'point updates and range sum queries' on a Fenwick tree data structure, which involves running algorithmic operations on provided data.
Attacks that exploit this kind of access
The rule that runs fenwick_tree safely
PolicyLayer is an MCP gateway: it sits between your AI agents and UnClick, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For fenwick_tree, this is the rule to start with:
fenwick_tree stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect UnClick, apply this rule, and every fenwick_tree call is checked against it from then on.
Questions about fenwick_tree
Build a Fenwick tree (Binary Indexed Tree) from values and run point updates and range sum queries. It is categorised as a Execute tool in the UnClick MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
fenwick_tree accepts 2 parameters: values, operations. Required: values. The full parameter table on this page comes from the server's own tool schema.
Register the UnClick MCP server in PolicyLayer and add a rule for fenwick_tree: 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 UnClick. Nothing to install.
fenwick_tree is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the fenwick_tree 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 fenwick_tree. 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.
fenwick_tree is provided by the UnClick MCP server (@unclick/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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