What the data for this category looks like
The data for this category mainly comes from official announcements and formal documents issued by the Ministry of Transport, provincial transportation departments, and expressway operation management institutions. Data updates are synchronized in real time with policy releases, with daily supplements of local implementation rules and temporary notices. The document structure includes fields such as policy document number, issuing authority, effective date, applicable road section scope, specific clauses, violation situations, and disposal standards. Clauses are divided by article, paragraph, and sub-paragraph. Single document length ranges from hundreds to tens of thousands of characters. Some cross-regional policies include multi-road section collaborative management content.
What constraints these characteristics impose on the "tool calling and plugins" workflow
Policy document lengths vary widely. Tool calling must adapt to context inputs of different lengths to avoid truncating key clauses. Fields contain multi-dimensional hierarchical information, so plugins must support precise filtering by fields such as policy document number, effective date, and applicable road section. Fuzzy keyword matching alone is insufficient. Data update frequency is not fixed, so plugins must support pulling the latest data source on demand, and overly long local cache cycles should be avoided. Cross-regional expressway projects need to call policy data from multiple provinces, so tool calling must support parallel retrieval of multiple data sources to avoid missing cross-regional policy requirements.
Configuration Settings
Reference only; verify against the target FastGPT release and deployment documentation.
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
toolChoice | auto | Supports automatic matching of the tool calling logic required for policy queries, no manual tool specification needed |
| Plugin timeout period | 300 seconds | Policy document retrieval and loading take significant time, preventing valid queries from being interrupted by timeout |
| Plugin parameter priority | Prioritize variables, fall back to default values | Adapts to policy differences across road sections, supports dynamic passing of variables such as road section numbers, uses preset default values when no parameters are provided |
| Number of parallel calls to multiple data sources | First 3 | Balances retrieval efficiency and system load, avoiding timeouts caused by calling too many regional data sources simultaneously |
functionCall | enabled | Forces structured function calling mode to ensure policy query results are returned in a parsable format |
| Maximum number of returned results | 10–15 entries | Controls the length of returned content, adapts to large model context window limits, and prevents information overload |
Three Common Misconfigurations
- Phenomenon: A cross-origin error occurs when calling the API, with a status code of 403. Cause: The domain name whitelist of the expressway operation system has not been added to the FastGPT API gateway configuration.
- Phenomenon: The workflow prompts "No matching content found" when calling knowledge base search. Cause: Policy documents have not been chunked and marked by expressway road section and policy type, leading to insufficient retrieval matching accuracy.
- Phenomenon: Plugin parameters cannot be retrieved from specified variables, and fallback to default values fails. Cause: The mapping relationship between variables and plugin parameters has not been correctly bound in the workflow, or the variable value is empty and no default value has been configured.
How to Verify Proper Configuration
- Initiate a policy query request, and check whether the returned results include complete policy document number, effective date, and applicable scope fields.
- Simulate passing different road section number variables, and confirm whether the plugin automatically switches to the corresponding policy data source based on the variables.
- Review the workflow log to confirm that the plugin calling timeout period matches the preset configuration, with no records of early termination.
- Test the cross-origin call scenario, and confirm that third-party systems can normally initiate API requests without permission errors.
The configuration values listed above are common starting points. They should be evaluated against the user's own specific samples and use cases.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-28.