AI agents call arfcn_calculator_5g_compute to retrieve information from Rfhub without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
M | object | — | SSB 频域偏移步长因子，取决于频段和 SSB 子载波间隔。例如 1、3、5 |
N | object | — | 用于 SSB 频域位置计算的参数 N，通常与 GSCN 或 raster 相关。例如 6312 |
SCS | object | — | 子载波间隔（Subcarrier Spacing），单位为 kHz，例如 15、30。影响资源块结构和带宽计算。 |
Band | object | — | 频段标识符，例如 `"n78"`、`"n41"` 等。用于确定频段的上下行配置、信道栅格（raster）及边界频率。 |
FREF | object | — | 频率参考值（FREF），例如 `"3500.0"`。用于在频率模式（Mode=`"f"`）下直接指定中心频率。 |
GSCN | object | — | 全局同步信道号（Global Synchronization Channel Number），用于粗粒度频率搜索，特别是在非服务小区初始接入时。例如 504990 |
Mode | object | — | 计算模式，例如 n 表示频点模式，f 表示频率模式 |
NREF | object | — | 频点参考值（NREF），例如 `"504999"`。用于在频点模式（Mode=`"n"`）下确定中心频率。 |
SSREF | object | — | SSB 中心频率对应的参考频率（单位：Hz 或 MHz，依上下文而定），常用于从 GSCN 或 SSB 配置反推绝对频率。 |
FRaster | object | — | 频率栅格（Frequency Raster），单位为 kHz，例如 5、15。用于频点与频率之间的转换计算。 |
Bandwidth | object | — | 信道带宽（Channel Bandwidth），单位为 MHz，例如 5、20、100。用于确定传输带宽配置（Transmission Bandwidth Configuration）。 |
SSBlockSCS | object | — | SSB（Synchronization Signal Block）的子载波间隔，单位为 kHz，例如 15、30。 |
Parameters from the server's own tool schema.
This is a calculator/converter tool that performs mathematical transformations and retrieves reference information about 5G NR frequency bands. It has no side effects on any system or data store, makes no modifications, and executes no external commands. It is purely a Read operation for querying/computing technical specifications.
From the tool's definition Tool performs frequency-to-channel-number conversion calculations for 5G NR networks and displays frequency band information.
Risk signalsHigh parameter count (14 properties)
Attacks that exploit this kind of access
支持5G NR网络中频率与频点之间的相互转换，并附带特定频段的详细信息展示. It is categorised as a Read tool in the Rfhub MCP Server, which means it retrieves data without modifying state.
arfcn_calculator_5g_compute accepts 12 parameters: M, N, SCS, Band, FREF, GSCN, Mode, NREF, SSREF, FRaster, Bandwidth, SSBlockSCS. The full parameter table on this page comes from the server's own tool schema.
Register the Rfhub MCP server in PolicyLayer and add a rule for arfcn_calculator_5g_compute: 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 Rfhub. Nothing to install.
arfcn_calculator_5g_compute 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 arfcn_calculator_5g_compute 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 arfcn_calculator_5g_compute. 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.
arfcn_calculator_5g_compute is provided by the Rfhub MCP server (rfhub-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →