cidr_infoParse an IPv4 CIDR block (e.g. "192.168.1.0/24") and compute the network address, broadcast, netmask, wildcard, usable host range and host count. Keyless, offline.
| Name | Required | Description | Default |
|---|---|---|---|
| cidr | Yes | An IPv4 CIDR, e.g. "10.0.0.0/8". |
Changes observed during successful MCP inspections.
Input schema / examplesAdded value: +[
+ {
+ "cidr": "192.168.1.0/24"
+ },
+ {
+ "cidr": "10.0.0.0/8"
+ }
+]Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate read-only, idempotent, and non-destructive behavior. The description adds 'Keyless, offline', providing additional context about no external dependencies and offline operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is extremely concise: one sentence stating the core functionality followed by two key attributes. No filler or redundancy.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Despite lacking an output schema, the description explicitly lists all computed outputs (network address, broadcast, etc.), making the tool's return values clear. Combined with annotations, the context is complete for this simple tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, with the schema describing the parameter as 'An IPv4 CIDR, e.g. "10.0.0.0/8".' The tool description adds examples but does not substantially enhance parameter meaning beyond what the schema provides.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly specifies the action ('Parse', 'compute') and the resource (IPv4 CIDR block), and lists the computed outputs. It also distinguishes itself with 'Keyless, offline', differentiating from potentially similar tools.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies usage for parsing CIDR blocks but does not explicitly state when to use this tool versus alternatives like `parse_ip`. No when-not or exclusion criteria are provided.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
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