TollCalc MCP
Server Details
Calculate the road toll for trucks on European roads. Supports all countries in Europe.
- Status
- Healthy
- Last Tested
- Transport
- Streamable HTTP
- URL
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Tool Definition Quality
Average 4.5/5 across 2 of 2 tools scored.
The two tools have clearly distinct purposes: one calculates tolls, the other checks quota usage. There is no overlap or ambiguity.
Both tools follow the consistent verb_noun pattern (calculate_toll, get_quota), making them predictable and easy to distinguish.
With only two tools, the server is minimal but well-scoped for its specific purpose of toll calculation. The count is slightly low but still acceptable.
The core toll calculation tool is detailed, but there is no tool for listing countries or retrieving static reference data. The surface is functional but lacks auxiliary operations.
Available Tools
2 toolscalculate_tollAInspect
Calculate European road toll costs for heavy trucks and commercial vehicles. Supports 40+ countries. Response fields (all detail levels): origin, destination (resolved place names), total_toll_eur (float), total_distance_km, toll_km, toll_free_km, countries (array with country, country_name, total_km, toll_km, toll_eur), info_url (link to view this route calculation in the TollCalc web app — share with colleagues or open in browser). With detail=detailed: countries also include segments (road, type, km, toll_eur). With detail=full: segments also include geometry, source_url, matched_geofence; origin/destination include lat/lon coordinates.
| Name | Required | Description | Default |
|---|---|---|---|
| via | No | Optional intermediate waypoints (max 15) | |
| detail | No | Response detail level. compact (default): total + per-country summary. detailed: adds per-segment costs without geometry. full: adds routing debug info and geometry. | compact |
| origin | Yes | Start point: city/address (e.g. 'Munich, Germany') or 'lat;lon' (e.g. '48.1374;11.5755') | |
| vehicle | Yes | Vehicle parameters | |
| destination | Yes | End point: city/address or 'lat;lon' |
Tool Definition Quality
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description must carry the behavioral burden. It explains response fields and how detail levels affect the output, including examples. It does not mention any destructive actions or side effects, but as a calculation tool, that is acceptable.
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 well-structured with a clear front-loaded purpose, followed by detailed response fields and detail-level variations. Although slightly lengthy, each sentence adds meaningful information.
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?
Given the complexity (5 parameters, nested objects, 3 required, no output schema), the description comprehensively explains all return fields at different detail levels, covering what the agent needs to know about the output.
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?
Input schema coverage is 100%, providing baseline 3. The description adds value beyond schema by giving examples for origin/destination and explaining detail levels and vehicle parameters more intuitively.
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 verb-action 'Calculate European road toll costs for heavy trucks and commercial vehicles' with a specific resource scope (40+ countries). This distinguishes it from the sibling tool 'get_quota'.
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 calculating tolls but does not explicitly state when to use or not use this tool versus `get_quota`. No guidance on prerequisites or alternatives beyond the purpose.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
get_quotaAInspect
Check remaining free-tier quota for this MCP session. Without authentication, 10 free requests are available per session. Pass an API key via Authorization: Bearer header for plan-based quota.
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
Tool Definition Quality
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Discloses that without authentication, only 10 free requests are available per session, and that passing an API key changes behavior to plan-based quota. This is beyond what annotations (none) provide.
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?
Two concise sentences, front-loaded with purpose, then key usage details. Every sentence is informative and no redundant text.
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?
For a parameterless tool, the description covers the essential context: what it does and authentication impact. Lacks output format but sufficient for an agent to use correctly.
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?
There are no parameters, so the description cannot add meaning beyond the schema. However, it explains the return concept (quota info) without detailing format. Baseline 4 is appropriate.
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 explicitly states 'Check remaining free-tier quota for this MCP session', which is a specific verb-resource pair. It clearly distinguishes from the sibling tool 'calculate_toll' by focusing on quota.
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?
Provides clear context on when to use: to check quota. Also explains authentication requirements and the difference between free and plan-based quota, guiding the agent on prerequisites.
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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