save_articleSecurely extract a public URL and idempotently add it to the account's library. Returns alreadySaved=true for a duplicate and reports hard paywalls instead of claiming success.
| Name | Required | Description | Default |
|---|---|---|---|
| url | Yes | ||
| tags | No | ||
| status | No | ||
| starred | No |
| Name | Required | Description | Default |
|---|---|---|---|
| item | Yes | ||
| extraction | Yes | ||
| alreadySaved | Yes |
Changes observed during successful MCP inspections.
Output schema / properties / item / allOfAdded value: +[
+ {
+ "additionalProperties": {},
+ "properties": {
+ "articleStatus": {
+ "type": "string"
+ },
+ "asset": {
+ "anyOf": [
+ {
+ "additionalProperties": {},
+ "properties": {
+ "checksum": {
+ "type": "string"
+ },
+ "downloadUrl": {
+ "type": "string"
+ },
+ "fileName": {
+ "type": "string"
+ },
+ "itemId": {
+ "description": "UUID that identifies the resource; pass it back exactly as smry returned it.",
+ "pattern": "^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$",
+ "type": "string"
+ },
+ "mimeType": {
+ "type": "string"
+ },
+ "resourceUri": {
+ "type": "string"
+ },
+ "size": {
+ "type": "number"
+ },
+ "updatedAt": {
+ "type": "string"
+ }
+ },
+ "required": [
+ "itemId",
+ "fileName",
+ "mimeType",
+ "size",
+ "checksum",
+ "updatedAt",
+ "resourceUri",
+ "downloadUrl"
+ ],
+ "type": "object",
+ "x-smry-component": "LibraryAsset"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "captureMethod": {
+ "anyOf": [
+ {
+ "const": "reader",
+ "type": "string"
+ },
+ {
+ "const": "extension",
+ "type": "string"
+ },
+ {
+ "const": "upload",
+ "type": "string"
+ },
+ {
+ "const": "rss",
+ "type": "string"
+ },
+ {
+ "const": "email_inbox",
+ "type": "string"
+ },
+ {
+ "const": "api",
+ "type": "string"
+ },
+ {
+ "const": "import",
+ "type": "string"
+ }
+ ]
+ },
+ "classification": {
+ "additionalProperties": {},
+ "properties": {
+ "confidence": {
+ "maximum": 100,
+ "minimum": 0,
+ "type": "integer"
+ },
+ "method": {
+ "anyOf": [
+ {
+ "const": "user",
+ "type": "string"
+ },
+ {
+ "const": "source_adapter",
+ "type": "string"
+ },
+ {
+ "const": "mime",
+ "type": "string"
+ },
+ {
+ "const": "extension",
+ "type": "string"
+ },
+ {
+ "const": "url",
+ "type": "string"
+ },
+ {
+ "const": "metadata",
+ "type": "string"
+ },
+ {
+ "const": "legacy",
+ "type": "string"
+ },
+ {
+ "const": "fallback",
+ "type": "string"
+ }
+ ]
+ },
+ "updatedAt": {
+ "type": "string"
+ },
+ "version": {
+ "type": "string"
+ }
+ },
+ "required": [
+ "method",
+ "confidence",
+ "version",
+ "updatedAt"
+ ],
+ "type": "object"
+ },
+ "contentKind": {
+ "anyOf": [
+ {
+ "const": "article",
+ "type": "string"
+ },
+ {
+ "const": "website",
+ "type": "string"
+ },
+ {
+ "const": "book",
+ "type": "string"
+ },
+ {
+ "const": "email",
+ "type": "string"
+ },
+ {
+ "const": "pdf",
+ "type": "string"
+ },
+ {
+ "const": "social_post",
+ "type": "string"
+ },
+ {
+ "const": "video",
+ "type": "string"
+ },
+ {
+ "const": "podcast_episode",
+ "type": "string"
+ },
+ {
+ "const": "document",
+ "type": "string"
+ },
+ {
+ "const": "unknown",
+ "type": "string"
+ }
+ ]
+ },
+ "domain": {
+ "type": "string"
+ },
+ "externalId": {
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "fileName": {
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "format": {
+ "anyOf": [
+ {
+ "const": "html",
+ "type": "string"
+ },
+ {
+ "const": "pdf",
+ "type": "string"
+ },
+ {
+ "const": "epub",
+ "type": "string"
+ },
+ {
+ "const": "markdown",
+ "type": "string"
+ },
+ {
+ "const": "plain_text",
+ "type": "string"
+ },
+ {
+ "const": "document",
+ "type": "string"
+ },
+ {
+ "const": "spreadsheet",
+ "type": "string"
+ },
+ {
+ "const": "presentation",
+ "type": "string"
+ },
+ {
+ "const": "audio",
+ "type": "string"
+ },
+ {
+ "const": "video",
+ "type": "string"
+ },
+ {
+ "const": "unknown",
+ "type": "string"
+ }
+ ]
+ },
+ "id": {
+ "type": "string"
+ },
+ "lastReadAt": {
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "metadata": {
+ "patternProperties": {
+ "^(.*)$": {}
+ },
+ "type": "object"
+ },
+ "mimeType": {
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "originalUrl": {
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "readProgress": {
+ "type": [
+ "number",
+ "null"
+ ]
+ },
+ "savedAt": {
+ "type": "string"
+ },
+ "starred": {
+ "type": "boolean"
+ },
+ "status": {
+ "type": "string"
+ },
+ "tags": {
+ "items": {
+ "type": "string"
+ },
+ "type": "array"
+ },
+ "title": {
+ "type": "string"
+ },
+ "updatedAt": {
+ "type": "string"
+ },
+ "url": {
+ "type": "string"
+ }
+ },
+ "required": [
+ "id",
+ "url",
+ "originalUrl",
+ "title",
+ "domain",
+ "contentKind",
+ "classification",
+ "captureMethod",
+ "format",
+ "mimeType",
+ "fileName",
+ "asset",
+ "externalId",
+ "status",
+ "starred",
+ "tags",
+ "savedAt",
+ "updatedAt",
+ "lastReadAt",
+ "readProgress",
+ "articleStatus"
+ ],
+ "type": "object",
+ "x-smry-component": "LibraryItem"
+ },
+ {
+ "additionalProperties": false,
+ "properties": {
+ "article": {
+ "additionalProperties": {},
+ "propertyNames": {
+ "type": "string"
+ },
+ "type": "object"
+ }
+ },
+ "type": "object"
+ }
+]Output schema / properties / item / propertiesRemoved value: -{
- "article": {
- "additionalProperties": {},
- "propertyNames": {
- "type": "string"
- },
- "type": "object"
- },
- "articleStatus": {
- "type": "string"
- },
- "asset": {
- "anyOf": [
- {
- "additionalProperties": {},
- "properties": {
- "checksum": {
- "type": "string"
- },
- "downloadUrl": {
- "type": "string"
- },
- "fileName": {
- "type": "string"
- },
- "itemId": {
- "pattern": "^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$",
- "type": "string"
- },
- "mimeType": {
- "type": "string"
- },
- "resourceUri": {
- "type": "string"
- },
- "size": {
- "type": "number"
- },
- "updatedAt": {
- "type": "string"
- }
- },
- "required": [
- "itemId",
- "fileName",
- "mimeType",
- "size",
- "checksum",
- "updatedAt",
- "resourceUri",
- "downloadUrl"
- ],
- "type": "object"
- },
- {
- "type": "null"
- }
- ]
- },
- "captureMethod": {
- "anyOf": [
- {
- "const": "reader",
- "type": "string"
- },
- {
- "const": "extension",
- "type": "string"
- },
- {
- "const": "upload",
- "type": "string"
- },
- {
- "const": "rss",
- "type": "string"
- },
- {
- "const": "email_inbox",
- "type": "string"
- },
- {
- "const": "api",
- "type": "string"
- },
- {
- "const": "import",
- "type": "string"
- }
- ]
- },
- "classification": {
- "additionalProperties": {},
- "properties": {
- "confidence": {
- "maximum": 100,
- "minimum": 0,
- "type": "integer"
- },
- "method": {
- "anyOf": [
- {
- "const": "user",
- "type": "string"
- },
- {
- "const": "source_adapter",
- "type": "string"
- },
- {
- "const": "mime",
- "type": "string"
- },
- {
- "const": "extension",
- "type": "string"
- },
- {
- "const": "url",
- "type": "string"
- },
- {
- "const": "metadata",
- "type": "string"
- },
- {
- "const": "legacy",
- "type": "string"
- },
- {
- "const": "fallback",
- "type": "string"
- }
- ]
- },
- "updatedAt": {
- "type": "string"
- },
- "version": {
- "type": "string"
- }
- },
- "required": [
- "method",
- "confidence",
- "version",
- "updatedAt"
- ],
- "type": "object"
- },
- "contentKind": {
- "anyOf": [
- {
- "const": "article",
- "type": "string"
- },
- {
- "const": "website",
- "type": "string"
- },
- {
- "const": "book",
- "type": "string"
- },
- {
- "const": "email",
- "type": "string"
- },
- {
- "const": "pdf",
- "type": "string"
- },
- {
- "const": "social_post",
- "type": "string"
- },
- {
- "const": "video",
- "type": "string"
- },
- {
- "const": "podcast_episode",
- "type": "string"
- },
- {
- "const": "document",
- "type": "string"
- },
- {
- "const": "unknown",
- "type": "string"
- }
- ]
- },
- "domain": {
- "type": "string"
- },
- "externalId": {
- "type": [
- "string",
- "null"
- ]
- },
- "fileName": {
- "type": [
- "string",
- "null"
- ]
- },
- "format": {
- "anyOf": [
- {
- "const": "html",
- "type": "string"
- },
- {
- "const": "pdf",
- "type": "string"
- },
- {
- "const": "epub",
- "type": "string"
- },
- {
- "const": "markdown",
- "type": "string"
- },
- {
- "const": "plain_text",
- "type": "string"
- },
- {
- "const": "document",
- "type": "string"
- },
- {
- "const": "spreadsheet",
- "type": "string"
- },
- {
- "const": "presentation",
- "type": "string"
- },
- {
- "const": "audio",
- "type": "string"
- },
- {
- "const": "video",
- "type": "string"
- },
- {
- "const": "unknown",
- "type": "string"
- }
- ]
- },
- "id": {
- "type": "string"
- },
- "lastReadAt": {
- "type": [
- "string",
- "null"
- ]
- },
- "metadata": {
- "patternProperties": {
- "^(.*)$": {}
- },
- "type": "object"
- },
- "mimeType": {
- "type": [
- "string",
- "null"
- ]
- },
- "originalUrl": {
- "type": [
- "string",
- "null"
- ]
- },
- "readProgress": {
- "type": [
- "number",
- "null"
- ]
- },
- "savedAt": {
- "type": "string"
- },
- "starred": {
- "type": "boolean"
- },
- "status": {
- "type": "string"
- },
- "tags": {
- "items": {
- "type": "string"
- },
- "type": "array"
- },
- "title": {
- "type": "string"
- },
- "updatedAt": {
- "type": "string"
- },
- "url": {
- "type": "string"
- }
-}Output schema / properties / item / requiredRemoved value: -[
- "id",
- "url",
- "originalUrl",
- "title",
- "domain",
- "contentKind",
- "classification",
- "captureMethod",
- "format",
- "mimeType",
- "fileName",
- "asset",
- "externalId",
- "status",
- "starred",
- "tags",
- "savedAt",
- "updatedAt",
- "lastReadAt",
- "readProgress",
- "articleStatus"
-]Output schema / properties / item / typeRemoved value: -"object"Input schema / properties / starredAdded value: +{
+ "type": "boolean"
+}Output schema / properties / item / properties / starredAdded value: +{
+ "type": "boolean"
+}Output schema / properties / item / requiredPrevious value: -[
- "id",
- "url",
- "originalUrl",
- "title",
- "domain",
- "contentKind",
- "classification",
- "captureMethod",
- "format",
- "mimeType",
- "fileName",
- "asset",
- "externalId",
- "status",
- "tags",
- "savedAt",
- "updatedAt",
- "lastReadAt",
- "readProgress",
- "articleStatus"
-]New value: +[
+ "id",
+ "url",
+ "originalUrl",
+ "title",
+ "domain",
+ "contentKind",
+ "classification",
+ "captureMethod",
+ "format",
+ "mimeType",
+ "fileName",
+ "asset",
+ "externalId",
+ "status",
+ "starred",
+ "tags",
+ "savedAt",
+ "updatedAt",
+ "lastReadAt",
+ "readProgress",
+ "articleStatus"
+]Input schema / $schemaRemoved value: -"http://json-schema.org/draft-07/schema#"Input schema / properties / status / anyOfAdded value: +[
+ {
+ "const": "inbox",
+ "type": "string"
+ },
+ {
+ "const": "later",
+ "type": "string"
+ },
+ {
+ "const": "archive",
+ "type": "string"
+ }
+]Input schema / properties / status / enumRemoved value: -[
- "inbox",
- "later",
- "archive"
-]Input schema / properties / status / typeRemoved value: -"string"Input schema / properties / tags / items / minLengthRemoved value: -1Input schema / properties / url / descriptionRemoved value: -"The public http or https article or YouTube URL to read."Output schema / (root)Previous value: -nullNew value: +{
+ "$schema": "https://json-schema.org/draft/2020-12/schema",
+ "additionalProperties": false,
+ "properties": {
+ "alreadySaved": {
+ "type": "boolean"
+ },
+ "extraction": {
+ "additionalProperties": false,
+ "properties": {
+ "cacheHit": {
+ "type": "boolean"
+ },
+ "qualityStatus": {
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "source": {
+ "type": "string"
+ }
+ },
+ "required": [
+ "source",
+ "cacheHit",
+ "qualityStatus"
+ ],
+ "type": "object"
+ },
+ "item": {
+ "properties": {
+ "article": {
+ "additionalProperties": {},
+ "propertyNames": {
+ "type": "string"
+ },
+ "type": "object"
+ },
+ "articleStatus": {
+ "type": "string"
+ },
+ "asset": {
+ "anyOf": [
+ {
+ "additionalProperties": {},
+ "properties": {
+ "checksum": {
+ "type": "string"
+ },
+ "downloadUrl": {
+ "type": "string"
+ },
+ "fileName": {
+ "type": "string"
+ },
+ "itemId": {
+ "pattern": "^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$",
+ "type": "string"
+ },
+ "mimeType": {
+ "type": "string"
+ },
+ "resourceUri": {
+ "type": "string"
+ },
+ "size": {
+ "type": "number"
+ },
+ "updatedAt": {
+ "type": "string"
+ }
+ },
+ "required": [
+ "itemId",
+ "fileName",
+ "mimeType",
+ "size",
+ "checksum",
+ "updatedAt",
+ "resourceUri",
+ "downloadUrl"
+ ],
+ "type": "object"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "captureMethod": {
+ "anyOf": [
+ {
+ "const": "reader",
+ "type": "string"
+ },
+ {
+ "const": "extension",
+ "type": "string"
+ },
+ {
+ "const": "upload",
+ "type": "string"
+ },
+ {
+ "const": "rss",
+ "type": "string"
+ },
+ {
+ "const": "email_inbox",
+ "type": "string"
+ },
+ {
+ "const": "api",
+ "type": "string"
+ },
+ {
+ "const": "import",
+ "type": "string"
+ }
+ ]
+ },
+ "classification": {
+ "additionalProperties": {},
+ "properties": {
+ "confidence": {
+ "maximum": 100,
+ "minimum": 0,
+ "type": "integer"
+ },
+ "method": {
+ "anyOf": [
+ {
+ "const": "user",
+ "type": "string"
+ },
+ {
+ "const": "source_adapter",
+ "type": "string"
+ },
+ {
+ "const": "mime",
+ "type": "string"
+ },
+ {
+ "const": "extension",
+ "type": "string"
+ },
+ {
+ "const": "url",
+ "type": "string"
+ },
+ {
+ "const": "metadata",
+ "type": "string"
+ },
+ {
+ "const": "legacy",
+ "type": "string"
+ },
+ {
+ "const": "fallback",
+ "type": "string"
+ }
+ ]
+ },
+ "updatedAt": {
+ "type": "string"
+ },
+ "version": {
+ "type": "string"
+ }
+ },
+ "required": [
+ "method",
+ "confidence",
+ "version",
+ "updatedAt"
+ ],
+ "type": "object"
+ },
+ "contentKind": {
+ "anyOf": [
+ {
+ "const": "article",
+ "type": "string"
+ },
+ {
+ "const": "website",
+ "type": "string"
+ },
+ {
+ "const": "book",
+ "type": "string"
+ },
+ {
+ "const": "email",
+ "type": "string"
+ },
+ {
+ "const": "pdf",
+ "type": "string"
+ },
+ {
+ "const": "social_post",
+ "type": "string"
+ },
+ {
+ "const": "video",
+ "type": "string"
+ },
+ {
+ "const": "podcast_episode",
+ "type": "string"
+ },
+ {
+ "const": "document",
+ "type": "string"
+ },
+ {
+ "const": "unknown",
+ "type": "string"
+ }
+ ]
+ },
+ "domain": {
+ "type": "string"
+ },
+ "externalId": {
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "fileName": {
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "format": {
+ "anyOf": [
+ {
+ "const": "html",
+ "type": "string"
+ },
+ {
+ "const": "pdf",
+ "type": "string"
+ },
+ {
+ "const": "epub",
+ "type": "string"
+ },
+ {
+ "const": "markdown",
+ "type": "string"
+ },
+ {
+ "const": "plain_text",
+ "type": "string"
+ },
+ {
+ "const": "document",
+ "type": "string"
+ },
+ {
+ "const": "spreadsheet",
+ "type": "string"
+ },
+ {
+ "const": "presentation",
+ "type": "string"
+ },
+ {
+ "const": "audio",
+ "type": "string"
+ },
+ {
+ "const": "video",
+ "type": "string"
+ },
+ {
+ "const": "unknown",
+ "type": "string"
+ }
+ ]
+ },
+ "id": {
+ "type": "string"
+ },
+ "lastReadAt": {
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "metadata": {
+ "patternProperties": {
+ "^(.*)$": {}
+ },
+ "type": "object"
+ },
+ "mimeType": {
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "originalUrl": {
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "readProgress": {
+ "type": [
+ "number",
+ "null"
+ ]
+ },
+ "savedAt": {
+ "type": "string"
+ },
+ "status": {
+ "type": "string"
+ },
+ "tags": {
+ "items": {
+ "type": "string"
+ },
+ "type": "array"
+ },
+ "title": {
+ "type": "string"
+ },
+ "updatedAt": {
+ "type": "string"
+ },
+ "url": {
+ "type": "string"
+ }
+ },
+ "required": [
+ "id",
+ "url",
+ "originalUrl",
+ "title",
+ "domain",
+ "contentKind",
+ "classification",
+ "captureMethod",
+ "format",
+ "mimeType",
+ "fileName",
+ "asset",
+ "externalId",
+ "status",
+ "tags",
+ "savedAt",
+ "updatedAt",
+ "lastReadAt",
+ "readProgress",
+ "articleStatus"
+ ],
+ "type": "object"
+ }
+ },
+ "required": [
+ "item",
+ "extraction",
+ "alreadySaved"
+ ],
+ "type": "object"
+}Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare idempotentHint, openWorldHint, destructiveHint and readOnlyHint, so the safety profile is covered structurally. The description still earns credit by disclosing failure semantics beyond the annotations: it returns alreadySaved=true on duplicates and explicitly refuses to report success on hard paywalls, which is real behavioral context an agent could not get from the hints.
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 tight sentences with zero padding, and the core action is front-loaded ahead of the duplicate/paywall caveats. Every clause carries 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?
An output schema exists, so return values need not be explained, and the annotations carry the safety profile. The remaining gap is parameter meaning (0% schema coverage, no description support), which for a four-parameter mutation tool leaves the definition only minimally complete.
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 0% across four parameters, so the schema documents only types, not meaning. The description mentions only the URL implicitly ('extract a public URL') and says nothing about tags, status, or starred, leaving half the parameters semantically undocumented in both places.
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 gives a specific verb chain (extract a public URL, add it to the account's library) and a clear resource, so the agent knows this scrapes and persists a URL rather than reading or searching. It does not, however, differentiate itself from the ambiguous sibling save_content, so the boundary between the two save paths is left unresolved.
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?
Scoping is implied by 'public URL' (not private/authenticated pages) and by the idempotent duplicate behavior, which tells the agent re-saving is safe. But there is no explicit when-to-use versus siblings like save_content or update_library_item, and no stated prerequisites, so usage is inferred rather than stated.
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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