Hold two watched repositories against each other across downloads, OpenSSF scorecard, advisories, forks, stars and findings on record. Compares only; it does not pick a winner.
| Name | Required | Description | Default |
|---|---|---|---|
| a | Yes | Repository as owner/name. | |
| b | Yes | Repository as owner/name. |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the burden of disclosing behavior. It states 'Compares only' which implies a read-only, non-mutating operation, and 'does not pick a winner' clarifies that no decision is made. It also mentions the prerequisite of 'watched repositories'. While it does not describe permissions, side effects, or rate limits, the stated constraints provide meaningful transparency beyond a simple name.
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 two sentences: the first states the action and scope, the second clarifies a key limitation. It is front-loaded with the core purpose and uses no unnecessary words, making it appropriately concise and well-structured.
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 is relatively simple (two parameters, no output schema), and the description provides enough context for an agent to invoke it: it lists the comparison dimensions, the prerequisite of watched repositories, and the limitation of not choosing a winner. It does not describe the output format, but given the low complexity and full schema coverage, the description is sufficiently complete for selection and invocation.
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 input schema fully describes both parameters (a and b) as 'Repository as owner/name.' with 100% coverage. The description adds no additional parameter detail, so the baseline of 3 applies because the schema already handles parameter semantics.
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's purpose: to compare two repositories across specific metrics (downloads, OpenSSF scorecard, advisories, forks, stars, findings). The verb 'Hold... against each other' is specific and the resource ('watched repositories') is defined. It also distinguishes itself by noting it does not pick a winner, which is a clear scope limitation.
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 when to use the tool: when you have two watched repositories and want to compare them across the listed metrics. The phrase 'watched repositories' sets a prerequisite, and 'Compares only; it does not pick a winner' tells the agent not to expect a recommendation. However, it does not explicitly name alternative tools or exclusions, which prevents a 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.
Multiple tools overlap significantly: check_package, check_before_install, check_stack, and audit_manifest all inspect dependencies, while check_provider and provider_incidents both return incident data. Descriptions help somewhat, but the boundaries between these tools are unclear and could easily cause misselection.
Tool names follow no consistent pattern: some start with verbs (check_*, list_*, search_*), others are noun phrases (advisory_severity, domain_risk, provider_incidents), and one is a clause (who_can_publish). The mixed conventions reduce predictability and make it harder to infer tool behavior from the name.
With 31 tools, this is well above the 25-tool threshold for a single server, making the surface feel heavy and difficult to navigate. Even given the broad domain (packages, providers, models, registries), many tools could be consolidated or grouped more tightly.
The server provides extensive read coverage for packages, providers, models, and registries, but there are notable gaps such as no watchlist removal or model comparison, and some tools appear redundant rather than completing a lifecycle. Overall, it is broadly useful but not fully complete for its stated purpose.