Compare two MCP servers side-by-side.
| Name | Required | Description | Default |
|---|---|---|---|
| slugA | Yes | first server slug (required) | |
| slugB | Yes | second server slug (required) |
| Name | Required | Description | Default |
|---|---|---|---|
| a | Yes | ||
| b | Yes |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, and the description only says 'Compare two MCP servers side-by-side' without disclosing behavioral traits such as whether the operation is read-only, what happens with invalid slugs, how results are presented, or any side effects. This is a significant gap for a tool with no annotation support.
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 a single, front-loaded sentence with no filler words. It efficiently conveys the core purpose without extraneous detail, earning full marks for conciseness.
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 tool has a simple interface (two required parameters) and an output schema exists, which reduces the need to describe return values. However, the description lacks any detail about what the comparison entails or behavioral caveats, and with no annotations, completeness is only adequate, not rich.
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 description coverage is 100% for both parameters (slugA and slugB), so the schema already documents the parameter semantics. The description adds no additional meaning beyond noting that two servers are compared, which does not go beyond the schema's information.
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 states the tool compares two MCP servers, using a specific verb ('compare') and a specific resource ('MCP servers'). It distinguishes itself from sibling tools like get_server (single server) and search_servers (find servers) by explicitly targeting a side-by-side comparison of two named servers.
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 context implies usage when the agent wants to compare two specific servers identified by slugs, which is clear. However, there is no explicit guidance on when not to use this tool or which alternatives (e.g., get_server) to choose for a single-server lookup, so it falls short of a full 5.
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 targets a distinct operation on the catalog: listing categories, languages, tags, hot, trending; searching; getting details; comparing. No overlap in functionality.
All tool names follow the verb_noun pattern consistently (list_*, get_*, search_*, compare_*), using snake_case throughout.
8 tools is a well-scoped size for a server directory, covering browsing, search, and detail retrieval without being overwhelming.
The tool set covers listing, searching, and comparing servers. Missing a direct 'list all servers' endpoint, but search with empty query likely fills that gap.
