Check whether a body is valid JSON. The body is discarded.
| Name | Required | Description | Default |
|---|---|---|---|
| url | No | HTTPS URL to normalize or cite | |
| host | No | Public hostname | |
| json | No | JSON text to validate; discarded after the check | |
| zone | No | IANA timezone name |
Changes observed during successful MCP inspections. Dates show when Glama detected each change.
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description transparently notes that the body is discarded, indicating no persistence. However, it does not disclose potential side effects such as network calls, rate limits, or whether the validation is local or remote, leaving some behavioral ambiguity.
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 and front-loaded, stating the core action and the disposal of the body in a single sentence. No unnecessary words or verbose explanations.
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?
The description lacks essential context: it does not specify what output the tool produces (e.g., boolean, error message), how the json parameter relates to the other parameters, or any prerequisites like valid URL formats. The mismatched parameter descriptions further reduce completeness, making it hard for an agent to understand the full scope of the 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?
The parameter descriptions are largely irrelevant to the tool's purpose. The url, host, and zone parameters have descriptions like 'HTTPS URL to normalize or cite' and 'IANA timezone name' which have no apparent connection to JSON validation. Only the json parameter description aligns with the tool's function, but the others are misleading.
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 states the tool checks whether a body is valid JSON, which aligns with the tool name. However, it is ambiguous what 'body' refers to; the json parameter is the likely candidate but not explicitly identified, causing slight confusion.
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?
No guidance is provided on when to use this tool versus other tools like citation or normalize-url. The description does not mention any specific use case or conditions that would make this tool preferred.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Add one secure layer between your agents and this server.
Each tool has a clearly distinct purpose, covering URL analysis, time/date, HTTP status, robots.txt, and JSON validation with no significant overlap or ambiguity.
All tool names use a consistent lowercase-with-hyphens convention, matching the style across the entire set with no mixed casing or underscores.
The set of 11 tools is reasonable for a general-purpose utility server, providing a moderate breadth without feeling bloated or sparse.
The domain appears to be 'web developer utilities,' and while it covers common needs like URL handling, time, HTTP status, and JSON, some expected utilities (e.g., base64, HTML escaping) are missing, making it slightly incomplete.