FREE, no API key. Read a fixed handler-generated input/output example for a listed non-network tool before supplying your own task input. Accepts only a tool name; cannot run custom input, access a wallet or spend credits. Examples are synthetic, not customer activity.
| Name | Required | Description | Default |
|---|---|---|---|
| name | Yes |
Changes observed during successful MCP inspections.
Input schema / properties / name / enumPrevious value: -[
- "html_main_text",
- "html_jsonld",
- "html_tables",
- "web_robots_evaluate",
- "contracts_openapi_lint",
- "contracts_openapi_diff",
- "contracts_jsonschema_validate",
- "security_secret_scan",
- "security_secret_redact",
- "agents_config_audit",
- "web_page_pack",
- "web_link_shortlist",
- "web_page_delta",
- "data_json_patch",
- "html_metadata",
- "html_links",
- "html_headings",
- "html_forms",
- "html_images",
- "html_feeds",
- "data_json_pointer",
- "data_json_diff",
- "data_json_canonical",
- "security_jwt_inspect",
- "security_csp_audit",
- "security_header_audit",
- "security_cookie_audit",
- "agents_env_template_check",
- "agents_tool_name_conflicts",
- "text_chunk",
- "commerce_gtin_validate",
- "commerce_variant_compare",
- "commerce_pack_plan",
- "commerce_money_parse",
- "commerce_offer_extract",
- "commerce_unit_price",
- "commerce_price_components",
- "commerce_main_product",
- "commerce_pack_size_normalize",
- "commerce_feed_page_compare"
-]New value: +[
+ "html_main_text",
+ "html_jsonld",
+ "html_tables",
+ "web_robots_evaluate",
+ "contracts_openapi_lint",
+ "contracts_openapi_diff",
+ "contracts_jsonschema_validate",
+ "security_secret_scan",
+ "security_secret_redact",
+ "agents_config_audit",
+ "web_page_pack",
+ "web_link_shortlist",
+ "web_page_delta",
+ "web_wikipedia_pack",
+ "web_thread_pack",
+ "data_json_patch",
+ "html_metadata",
+ "html_links",
+ "html_headings",
+ "html_forms",
+ "html_images",
+ "html_feeds",
+ "data_json_pointer",
+ "data_json_diff",
+ "data_json_canonical",
+ "security_jwt_inspect",
+ "security_csp_audit",
+ "security_header_audit",
+ "security_cookie_audit",
+ "agents_env_template_check",
+ "agents_tool_name_conflicts",
+ "text_chunk",
+ "commerce_gtin_validate",
+ "commerce_variant_compare",
+ "commerce_pack_plan",
+ "commerce_money_parse",
+ "commerce_offer_extract",
+ "commerce_unit_price",
+ "commerce_price_components",
+ "commerce_main_product",
+ "commerce_pack_size_normalize",
+ "commerce_feed_page_compare"
+]Input schema / properties / name / enumPrevious value: -[
- "html_main_text",
- "html_jsonld",
- "html_tables",
- "web_robots_evaluate",
- "contracts_openapi_lint",
- "contracts_openapi_diff",
- "contracts_jsonschema_validate",
- "security_secret_scan",
- "security_secret_redact",
- "agents_config_audit",
- "data_json_patch",
- "html_metadata",
- "html_links",
- "html_headings",
- "html_forms",
- "html_images",
- "html_feeds",
- "data_json_pointer",
- "data_json_diff",
- "data_json_canonical",
- "security_jwt_inspect",
- "security_csp_audit",
- "security_header_audit",
- "security_cookie_audit",
- "agents_env_template_check",
- "agents_tool_name_conflicts",
- "text_chunk",
- "commerce_gtin_validate",
- "commerce_variant_compare",
- "commerce_pack_plan",
- "commerce_money_parse",
- "commerce_offer_extract",
- "commerce_unit_price",
- "commerce_price_components",
- "commerce_main_product",
- "commerce_pack_size_normalize",
- "commerce_feed_page_compare"
-]New value: +[
+ "html_main_text",
+ "html_jsonld",
+ "html_tables",
+ "web_robots_evaluate",
+ "contracts_openapi_lint",
+ "contracts_openapi_diff",
+ "contracts_jsonschema_validate",
+ "security_secret_scan",
+ "security_secret_redact",
+ "agents_config_audit",
+ "web_page_pack",
+ "web_link_shortlist",
+ "web_page_delta",
+ "data_json_patch",
+ "html_metadata",
+ "html_links",
+ "html_headings",
+ "html_forms",
+ "html_images",
+ "html_feeds",
+ "data_json_pointer",
+ "data_json_diff",
+ "data_json_canonical",
+ "security_jwt_inspect",
+ "security_csp_audit",
+ "security_header_audit",
+ "security_cookie_audit",
+ "agents_env_template_check",
+ "agents_tool_name_conflicts",
+ "text_chunk",
+ "commerce_gtin_validate",
+ "commerce_variant_compare",
+ "commerce_pack_plan",
+ "commerce_money_parse",
+ "commerce_offer_extract",
+ "commerce_unit_price",
+ "commerce_price_components",
+ "commerce_main_product",
+ "commerce_pack_size_normalize",
+ "commerce_feed_page_compare"
+]Input schema / properties / name / enumPrevious value: -[
- "html_main_text",
- "html_jsonld",
- "html_tables",
- "web_robots_evaluate",
- "contracts_openapi_lint",
- "contracts_openapi_diff",
- "contracts_jsonschema_validate",
- "security_secret_scan",
- "security_secret_redact",
- "agents_config_audit",
- "data_json_patch",
- "html_metadata",
- "html_links",
- "html_headings",
- "html_forms",
- "html_images",
- "html_feeds",
- "data_json_pointer",
- "data_json_diff",
- "data_json_canonical",
- "security_jwt_inspect",
- "security_csp_audit",
- "security_header_audit",
- "security_cookie_audit",
- "agents_env_template_check",
- "agents_tool_name_conflicts",
- "text_chunk",
- "commerce_gtin_validate",
- "commerce_variant_compare",
- "commerce_pack_plan",
- "commerce_money_parse",
- "commerce_offer_extract",
- "commerce_unit_price",
- "commerce_price_components"
-]New value: +[
+ "html_main_text",
+ "html_jsonld",
+ "html_tables",
+ "web_robots_evaluate",
+ "contracts_openapi_lint",
+ "contracts_openapi_diff",
+ "contracts_jsonschema_validate",
+ "security_secret_scan",
+ "security_secret_redact",
+ "agents_config_audit",
+ "data_json_patch",
+ "html_metadata",
+ "html_links",
+ "html_headings",
+ "html_forms",
+ "html_images",
+ "html_feeds",
+ "data_json_pointer",
+ "data_json_diff",
+ "data_json_canonical",
+ "security_jwt_inspect",
+ "security_csp_audit",
+ "security_header_audit",
+ "security_cookie_audit",
+ "agents_env_template_check",
+ "agents_tool_name_conflicts",
+ "text_chunk",
+ "commerce_gtin_validate",
+ "commerce_variant_compare",
+ "commerce_pack_plan",
+ "commerce_money_parse",
+ "commerce_offer_extract",
+ "commerce_unit_price",
+ "commerce_price_components",
+ "commerce_main_product",
+ "commerce_pack_size_normalize",
+ "commerce_feed_page_compare"
+]Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Adds real context beyond the annotations: free, no API key required, examples are fixed and synthetic (not customer activity), and the tool cannot run custom input, access a wallet, or spend credits. The annotations already cover readOnly/idempotent/closed-world, so this additional disclosure is genuinely additive.
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?
Three tight sentences, front-loaded with the cost/credential constraint, then the action, then the scope limits. Every clause earns its place with no redundancy.
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 one-parameter, no-output-schema utility, the description covers what the tool returns (a fixed example), the constraints, and the cost model. Minor gap: it doesn't clarify whether the returned example is a full request/response pair or how large it is.
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 coverage is 0%, so the description must carry the parameter's meaning. It does: the tool 'accepts only a tool name' drawn from a listed set of non-network tools, which explains the enum's scope beyond the bare list. It doesn't document how to obtain a valid name, so not a 5.
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?
States a specific verb and resource: read a fixed handler-generated input/output example for a listed non-network tool. The purpose is unambiguous and distinguishes it from execution tools ('cannot run custom input'). It does not explicitly name the preview siblings it might be confused with, so it falls just short of 5.
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?
Gives a clear when-to-use condition: 'before supplying your own task input.' It also states the negative case implicitly by contrasting with running custom input. No sibling tool is named as an alternative, so 4 rather than 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.